Having had both (haven't had Backyard BBQ yet this year, though, but I've heard good things about it), I would probably choose the Backyard BBQ, but Rivertown Junction is also really good. The food quality at Junction was good, definitely better than some buffets I've been to outside the park (Hometown Buffet, I'm lookin' at you). My only complaint was that the fries were old and didn't seem salted at all (not sure if they're supposed to be salted), but I mentioned it to someone and they brought fresh ones out without a problem. I think the only reason that I prefer the Backyard BBQ is because of the cost, but if you enjoy the type of food served at Junction, it would definitely be worth the extra cost.