We have sort of a "summer base" in the same area we used to have our stick built in. It is a good RV park on a river that charges $325 a month with full hook-ups (that's just over $10.00 per day).
When we travel we generally stay in campgrounds. We belong to KOA, Passport America, and Good Sams for slight discounts. We rarely use Walmarts or truck stops. Once and awhile we do use State or Federal campgrounds. We try to average $25.00 per night for CG fees while traveling.
For the winter we are hooked on the beaches of SW Florida. If you want to stay within a mile or two of the beaches and have perfect temps for 5 months you have to pay. We end up paying well over $40.00 per night at a RV resort in Florida.
That is one of the wonderful things about full time RVing. You can spend $1,000 a year for CG fees, or you can buy a $150,000 RV lot in the Florida Keys and pay $5,000 a year maintenance fees, or anything in between.