well, like i said.. LIVED there. thus the trailer. it's also a series of different rooms whose decor is meant to replicate that of a dorm room.
and smear, splat & dip currently perform there.
as far as backstories being obvious, most of the time they're just not. they're really not meant to be appreciated by the average guest, they're just a key imagineering concept to serve as a foundation for what's there today. when you walk down the street in your neighborhood and see the Indian restaurant, you don't know who the proprietor is or where he came from, how he ended up here, etc., but the reality is all those questions have answers. some more clear and concise than others.
they usually aren't obvious in WDW and really, one of the most popular and infamous ones for the HM turns out not to be a genuine backstory at all. but aside from HM (well, until recently),
everything imagineering creates has a backstory. some are more elaborate than others.
i don't know Harambe's story entirely. it's a small rundown village next to a wildlife preserve who survives mostly on commercialism (and not all that successful at it based on the state of the buildings). it has a hotel, a TON of safari companies (you see them all listed on the boards at Tusker House, although for the most part, only Kilimanjaro and the Pangani trail run expeditions while you're in the park) and Joe Rohde sells a lot of earrings.