If you're ever in Austin and looking for an RV park, try Oak Forest. It's a Passport America campground and has all the amenities. The only suggestion I had for their suggestion request was that they need wifi throughout the park, not just around the office/rec hall. Other than that it's clean, convenient and the staff are very friendly.
Another choice right within the city is McKinney Falls State Park. We stayed there one night but had to move as they were full for the weekend. We found Oak Park and never went back!
Sandra