I, for one, have enjoyed your (and Libby's) museum-type virtuals.  We visited several places that we didn't know existed and have had a blast trying to find all of the answers.  I didn't take the admin's comment to mean "place a physical cache on museum grounds", but merely to place a cache "near" the museum and call out in the cache description that there is also a museum nearby.  Mind you, I'm not saying that is a better thing to do, I'm just giving my interpretation.

My vote would be to stay your course and continue placing as you have.  I have liked that your coordinates don't always point to the front door, but sometimes to a feature that you chose to call special attention to.  That does require the GPSr (more so, at least).

Cache on, climber of peaks!

Tim
Team AZFastFeet