I'll be going from CA to FLA in late December and back again. I will be planning to stay at KOA's(first time) most of the time just have a break from the motel nonsense. So I have never stayed at a KOA and dont plan to use a tent(will have one just in case) but sleep in my truck(quad cab). Is there anything I should be aware of about KOA's? Do they take credit cards?

Also I will be packing a small military mess kit and a camp stove so any ideas about items I can pack in a small cooler would help.

Thanks.