Corpus Christi...you can be anywhere from Mustang island,,several parks there over to Aransas Pass..has to be 15 parks in close area there from $ to $$$$ also Rockport/Fulton area.
It was cold there this winter and we have never over wintered there Stayed until after Xmas once then to the Valley.
We do Florida now but if A.P. was 5-10 degrees warmer in winter we would stay there, never go to the RGV.
There is a circle drive from A.P. into CC down the SPID back thru Mustang Island and take the free ferries back across to A.P.
Look up rvparkreviews.com for all those areas..