Dos Brisas is very nice.....and that is represented in their price. We've dined there several times but never stayed at the 'bungaloes/cottages'.
The Driscoll in Austin is fun and lots of good restaurants and bars and music within walking distance.
Fredericksburg is also fun and they have a pretty good brew pub there for a lower key weekend.
San Antonio riverwalk is always nice when the temperatures are moderate. Stay at the Contessa, order the paella for dinner. Or any of a dozen other hotels, some with great restaurants. There are at least 6 GREAT restaurants on the riverwalk if you do a little research.