it was a bit old but not way too old; it’s a movie about these people who go through one of those old roller coasters where you get in a boat and continue on a stream. They landed in this weird alternate universe and I think they knew they would. Anyways they find a bunch of weird shit there, I think a T. rex chased them, there were a a bunch of giant logo structures and no people there but weird monkey alien things. One guy finds love with one of the weird hairy creatures and stays to live with them. They all get crazy drunk in this little oasis in the desert at one point, and end up getting home at the end? It’s a hilarious movie, can’t be older than the 1980. Any ideas?