We had a very rustic (no water, no power, outhouse) cabin in Mendocino county outside Pt. Arena that would just be flush with bats when we would show up each trip. Some would leave, others would buzz around the place for the duration. We used to catch them with the old popcorn "over the fireplace" basket. The smell was near stinky but also quite refreshing. Never bothered us in any way yet still there.