We're going to a family reunion in Wimberly, TX next week. (yes, I know it's going to be HOT!) We're flying into San Antonio and plan to spend the first night at a hotel on the Riverwalk and do something in San Antonio the next day before heading to Wimberly for the rest of the trip. Any tips for the Riverwalk? We have two little girls (7 and 6) - anything to recommend that they would enjoy doing? We are also considering doing Sea World on that second day. Anyone have any tips for Sea World? (I don't know how similar the one in San Antonio is to the one in Orlando) Thanks!