My parents are going on a big RV trip this summer, and in the middle of it is their 40th wedding anniversary. Since I won't be with them, I'd like to get them some kind of gift card or set up a nice meal for them. They'll actually be in Amarillo, TX, on their anniversary, but the best I can find there is the Big Texan, and my dad doesn't like big steaks so I'm not sure that would be much fun for them, although the kitchiness of it would fit them. They like pretty much all kinds of food except sushi and, like I said, Dad can't eat big pieces of meat for health reasons. Neither of them are big drinkers (one glass of wine maybe, but not a bottle) and aren't particularly fond of buffets. They're looking forward to seeing the west, the Grand Canyon, going to a Cirque show one night, etc.
What are some ideas of places I could send them in Vegas? Somewhere that would treat them special because of their anniversary but that also wouldn't require them to be really dressed up since they'll only have the clothes they're taking RVing (my mom will have a skirt, but dad at best will have khakis and a polo). My budget would be under $150. Or should I just set them up at the Big Texan or somewhere in Amarillo, would that be better since it's on the date of their anniversary?
Help a daughter out! Thanks!