Regarding a challenge cache final hidden behind a store, I think you do have to consider the rest of the challenge being part of the cache. Sure, it would be nice if every cache could be at the base of a waterfall and always sunny, but it doesn't always work that way. When Lee and I logged the Delorme challenge, we got out of my car at Delorme and Team Teebow handed us the logbook - that'd be pretty lame find IMO if the challenge itself was not factored into it.

Personally, I think gc.com did the wrong thing not allowing challenge owners to personally present the finals.