There's FREE parking at the Encore Casino. You can grab a bite to eat there, or just tour the River Walk and then catch a water shuttle downtown. My favorite way to get into town when the weather is nice. Or catch an Uber downtown from there. It's guaranteed to be cheaper than parking downtown. Check to see if there are any hotel specials there too. I'm not a Casino person, but a friend of mine stayed there once and the room was very nice.