Here's my opinion; take it for what it's worth, but I think there's some valuable information for both you and your husband. First, is she too young for you or your husband to be considering doing this? In my opinion, no, she's not, but she is at the very young end of the spectrum to which I would introduce her to an actual hunt, and would take some special steps because of that.
Now, considering the above, this decision, as others have stated, should be discussed between you and your husband; however, as a person that deals with youth quite a bit (Hunter Education Instructor, Boy Scout Leader, assisting with NRA Youth Sportsfest, etc.) I also believe that your daughter should have the ultimate decision in this process, with guidance from both parents.
Both of you (parents) first need to work out the concerns that you have, which I believe was the primary point of your first post. In my opinion, this part should be done in private, and should cover specific concerns such as getting lost, is she too young, is she going to be supervised, etc. These must be addressed first between the two of you, and some guidelines established so that you are both comfortable with the situation. If that means things such as being restricted to a certain distance from home, a certain location or length of time for the outing, etc., then that's what must be done. You both have to be comfortable with this decision; however, don't forget...after you've established what's acceptable to both of you, then there's much more to do. Don't forget, she may not even want to go even though mom and dad have agreed that it would be alright!
So, after the two of you have settled any concerns and come to an agreement, involve her in the decision process by talking to her about it. Cover things such as getting up early, being cold and possibly bored, walking for a while or sitting still depending on the style of hunt, and the fact that she may see an animal die. Explain that one to her particularly...she'll probably have questions. Be prepared and be truthful. For example, if she asks if the animal will feel it, then you tell her yes, but you should explain to her how important it is that we take every step to ensure that there is absolutely as little suffering as possible, and that the animal is being taken for a reason. You don't have to go into great detail at this age, but don't mislead her; prepare her for what she might experience.
Then temper those possibly negative things that you've just made her aware of with the positive aspects of this opportunity...things like being in the outdoors, what animals she might get to see in their natural surroundings, and the fact that she would get to spend some quality time with dad doing something that he enjoys and wants to share with her. Be prepared to accomodate her; for example, if getting out of bed early is a great concern of hers, suggest an afternoon hunt. If she doesn't like the sound of sitting, be ready to do some still hunting. Accomodate HER to make it an enjoyable experience if she should decide to go, even if it inconveniences dad by interrupting his normal hunting style.
You'll be surprised how she'll think this through with your help, and she will be able to make her own decision, again, with your help! Make sure she understands that
it's ok to say no, and that other opportunities will be available later if she changes her mind. I'm a firm believer that the ultimate decision (once the safety and technical details have been worked out between you two parents) should be hers. If she doesn't want to go, then
PLEASE don't force her. Offer her the opportunity later this year, next year, and the year after that, but never force her to do it if she doesn't want to try it herself. Even offer her alternatives that maybe the family can participate in together; she may not want to hunt, but you may find that she enjoys shooting (shooting at balloons with a .22 is a great way for a family to spend an afternoon...from experience
)
If she chooses to go, then great! If she want's mommy to go along, then by all means, join them! Again, at her age, she's certainly on the young end in my opinion, but there are ways to encourage her and ensure a happy outing the first few times: Keep them short and fun, and close to home. Take snacks and a drink, maybe even a coloring book and crayons. Expect her to be restless, and to talk; dad should talk with her, point out things in nature to her, joke around with her; in short, make sure she has a good time no matter what!
Most importantly, EXPECT her to be ready to go home in an hour or less; and when she express that desire,
the outing is over; everyone goes home together! That way she sees that it's ok to end the outing when you're no longer enjoying it, and that an hour in the woods with dad and/or mom is a good thing that both of them can enjoy, and that you aren't upset with her in any way for wanting to come home!
The importance of these early outings isn't to take an animal; if that happens, it's just an added bonus. However, that can't be used to judge a successful hunt with a youngster...the true success will be evident by the smile on the faces of everyone involved if it's done right!