Travler's World RV Resort is the only one we have stayed at. But it is a very nice place and probably the most convenient to downtown, the riverwalk, the Alamo, etc. The area surrounding the park is not the greatest, but never felt there was any problem there either.
There is a bus stop right outside the park if you prefer. But the drive downtown is easy and parking was not a problem. The street in front of the park runs straight downtown. There are several parking lots on that street and within a block or so of the main riverwalk area.
Also on/near the Mission Trail. You can visit some of the old Spanish missions from the 1700/1800's.
And of course, there is a Walmart a short distance away.