Thanks for the input.
The reason I'm thinking it should swing down is to make the interior more useful - to provide a place for sitting.
Even with the end of the bed swung down, there's still a lot of space under the rest of the bed for storage, and I envision things that would be stored under the swing-down section would be things that go outside - chairs, tables, things that would be outside when the camper is in use for sleeping, lounging, changing, etc.
I'll give some thought to swinging it different ways before I commit to a final design though, thanks again for the input.