In anticipation of possibly full timing in retirement I am doing some playing with budgets. Other than the RV loan (no I can't pay cash, and no my home has not been an appreciating asset so a loan is ...
By renting monthly and researching an area after spending in month in a given area looking for the least expensive acceptable RV parks in the area, we were able to keep our monthly average to less than $330 and nightly average to less than $11 for the last few years. Used to be less in past years but rates have gone up. We used Passport America (Dues about $44 per year) while in transit.
Note that rates back east are much higher than in the west.