We had the same problem-we finally found an RV hookup at Miller Creek RV at 281 and 290. Its about 7 miles north, but they seem nice. The people at Blanco Settlement were not nice at all, and not accomodating about a late checkout! I called the Brewery to inquire about parking with an RV and they seemed to think parking will be an issue as well. So, we will hook up there I guess. If you are just camping, I really didnt find any other areas, but Guadalupe S.P. still had water only campsites available as of a few days ago.

Good Luck!