Re: 3-Season or 4-Season Tent?
Check out the Cabels XPG ultralite tent. Its gotten great reviews, and while it's a 3 season tent (they have 4 season versions), most people say it works like a 4 season.
Last year during 2nd rifle here (mid October), I was dying from the heat! I pack a really warm bag, and a nice pad.
Don't bring Skittles to a gunfight.