Like Cajun Pop said, it will be difficult to find an opening this time of year. The SRA campgrounds (San Miguel and Cypress Bend) are booked solid, including RV spots. The state parks may have some openings if you book way in advance, they don't allow pets and their prices are ridiculous. Wildwood next to SRA San Miguel is nice, but I'm sure they're booking up quickly. Most folks who stay at Wildwood launch at San Miguel.