To be honest, I find you can spend as much or as little as you choose. You can stay nearby or you drive for days. I prefer playing "tourist" nearby. I find it it is easier to start exploring close to home and slowly move farther out. It allows me to find neat "local" festivals and events that I otherwise may have not heard about. I also lived most of my life in three locations that many people drive hundreds of miles to visit (east coast beach in FL, Southern Appalachian Mtns of NC and Chattanooga area of TN). Most people never visit what is within a few hours of their homes, mostly because they don't know.
Lubbock, TX is about 3 hours away. That is a comfortable drive for 2 to 4 nights. And uses about 2 tanks of gas (there and back).
I'm currently sitting in a little private park in Lubbock. Spending two nights here on a 30amp hookup. We are here to shop a little and go to the
Science Spectrum & Omni Theatre.
We are paying $30 ($3 cash discount per night) and the combo tickets for both the museum and the theatre is $14.50 per adult. While it's not a "destination park", I didn't expect nor want a "destination park". It's a decent and clean little park with fairly level pads that accepts pets. It's in town. The town is the "destination".
We treat the truck camper as our personal mobile motel room... with a kitchen. We had lunch at Cracker Barrel (4% off the meal by using gift cards we buy from Sam's Club) when we first got into town. Supper is a huge (12 servings) chicken pot pie ($19.24) which is pretty tasty and smells wonderful as it cooks in the oven. We will probably have leftovers for supper tomorrow night. The oven is doing double duty in keeping the camper warm (it's currently 62F and dropping to an overnight low of 33F). We do have a working furnace. We're gonna need it.
We are on a full hookup site but I filled the fresh tank with water before leaving (Lubbock's water is nasty tasting and smells "off"). We also left with empty waste tanks. I may just wait until we get back to our home park to dump the tanks. It depends on how I feel the day we leave as I'm not dragging the sewer hose out to hookup overnight because we don't take the camper off the back of the truck. We leave the dog in the camper while we shop and visit places.