First,congratulations on taking the kids hunting!!And respect.
On the boots....I don't know how to make this sound happy..but "Gotta get new boots to hunt in by Friday"sounds .......risky? That's pretty close.
IMO,the first requirement is that they fit,and you can walk in them.All day.Hard to hunt when your feet hurt.
I do not know what environment you are hunting in.Hills? Swamp? How many snakes? How cold? If its cold,not likely to see snakes...If it is warm enough for snakes,having wet feet for a day or two won't kill you...etc.
For most conditions,I'd find a light boot that fits,a birdhunting boot or something like a Danner Pronghorn(IF and only if that boot fits you!!)
I'd put finding a fit over the type of boot.I'm using some GI "RAT" boots I got off E-bay right now...not bad.They fit!!
If you are walking only ashort distance and standing in water,maybe rubber..but for my experience,rubber boots are good for muddy corrals,but hunting?Not so much.
ANY boot that fits is better than any boot that hurts after 3 miles.
I recommend some good,heavy merino wool sox,pay about $20 for them,and don't get them too small.
And even in Colorado winter,I prefer un insulated boots.I were sox to keep warm.