"Near Tampa" is a sorter of a relative term/area. There aren't any campgrounds in Tamps, those to the West are across the bay(s). There are a few to the East but I recently checked they are full or places I wouldn't want to stay.
Check out RV Trip Wizard or one of the other campground apps & you can see some choices.
LazyDays closed which was a favorite.
Most every place I looked at were full. At least for the mid January timeframe.