I'm in. Considering my longtime obsession with the 1st wasteland and given that I think the only times I come out of lurker mode is to post/submit anything wasteland related I find, how could I not?
Here are some possible ideas if it turns out a bunch of NPCs of donors are just too much/not fair (I think I agree, as much as I'd like to be some crazy retro apple II computer tech teacher/seller NPC in the game

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-The first wasteland had a graveyard with a couple joke rhymes on the headstones, maybe there can be a NMA graveyard with some donors listed?
-the donors can be names that will be referenced by the NPCs who do deserve to be there as "previous" patrons who didn't make it when the mutants attacked last time (or something)
-graffiti hidden around the bar (also in theme with wasteland 1, there were things carved into a couple tables)
-corpses found outside, somehow identified
-the equivalent of 'regulars' identifiers like some bars have - names/pics on wall behind bar (not obvious though), mugs w/names, maybe certain "regular" seats (a mini encounter where a seat is free until the PC sits there, after which the "regular" comes out of the bathroom to demand the seat back...), etc...
- a "regular's only" room in the back. It has NPCs in this back room, maybe the PC can see in through a window or know people are back there, or maybe not (they just know it's a locked or private party/gambling going on). There is NO way to get in to that room (maybe?) ... that is, without forcing their way in or some secret password almost impossible to find. Then the "regulars" attack! Who dares crash their private party! This would sort of break the NPC thing, but make it so the NPCs will never leave the room and normally you'd never see them so it's sort of halfway...now that I think about it, something similar to this occurred in wasteland also
- someone else mentioned this, make this a random encounter so it would rarely ever be seen...