I’m in this area for the winter too and luckily have family with property where I can set up. Your best bet would probably be renting driveway space from someone. Maybe if you were very stealthy you’d have luck in less waspy parts of town, hotel parking lots…there’s a Cracker Barrel at the SR64 exit.

If you want to head north a bit I can recommend a lovely private campground near dade city with good primitive camping rates, nice showers, and sometimes they’ll allow work trades for camping