With nearly 500 parks there are very few where you will need reservations. Just come down, get a spot for a week and see what you like. Be aware many parks are either on business or expressway 83 and can have a lot of traffic noise. I like the parks on S Bentsen Palm Drive just west of Mission. They are away from the highway and near the World Birding Center, National Butterfly Center, Bentsen Rio Grande State Park, Mission Nature Park and paved biking trails. Bentsen Palm Village, Retama Village, Val's Country Coral, Golden Grove, Green Gate Grove, Americana, & Bentsen Grove. Americana usually has early season specials by the week, just ask.
pawatt