As far as where to stay, I think I would stay in Pahrump. It is a little closer to Frontsight than Las Vegas. During the class you won't really have time to do anything in Las Vegas anyway. There arn't a lot of choices of where to stay in Pahrump. There is the Saddle West and the Best Western. I would choose the Best Western.
What to bring. Prepare for any kind of weather. It might be sunny and hot, or it might be cold/windy/raining. This time of the year you never know. Make sure you keep yourself hydrated, do wear sun block no matter what the weather. Take some eye drops to keep your eyes sharp and to wash out any blowing sand.
You will need to bring your own food to Frontsight. There are two super markets in Pahrump as well as a Wal-Mart. I personally take food so I can snack throughout the day. I believe I stay sharper and more focused if I eat a little somthing every hour or so. I take stuff like granola bars etc. Stuff that I can handle with dirty hands. I usually wear a Camelback to keep hydrated.
If you don't have your ammo, you might want to look into buying it at the Pahrump Wal-Mart. You can call them on the phone and they will reserve it for you.
Give your cover garment a little thought. In four day handgun, you will be shooting most of the second two days all from concealment. You might want to wear a sweatshirt on day three so you can practice drawing from a cover garment that doesn't open in the front. Then on day four wear something that does open in front like a coat, or a vest. It is much easier if this garment has a little weight to it so you can get it out of the way to draw. You can also put something in your strong side pocket to weigh it down a little.
Make sure your gear is solid. Good quality guns that are properly cleaned and lubricated. Good quality ammo. Good quality holster and mag pouch. You can get by with just a couple magazines, but the more you have, the better. You might also want to invest in some kind of magazine loading tool to save your fingers: you are going to be doing a ton of magazine loading. IMO, it helps to wear pants that are on the loose side. You will be doing some tactical magazine changes where you have to retain the partially expended magazine and you have to have somewhere to stow it. This whole proceedure is done on the clock and you can game this a little by having a loose pocket to stuff the magazine into. Make sure you can get to the pocket with when wearing your gear.
You are going to have a good time.
I have been to a couple different firearms schools and Frontsight's basic handgun class is the best that I have been to.
There are a couple of internet forums for Frontsight students. One is the Frontsight forum which requires you to be a member of Frontsight to access it. The other is:
http://www.polite-society.org/