Are these places super far from the Alamo/Riverwalk area? Which would you recommend? Due to our length of stay, we can only choose one :/ These are the only things I know for sure: Six Flags, no outside food, Schlitterbahn you can bring in your own stuff. With our military discount, both are the same price. Six Flags has both water rides as well as amusement park rides, Schlitterbahn of course only the water rides. Thanks for all your help!