Hey Scott, thanks!
The sessions have been about two hours long, and yeah, I think we've covered a lot in both. Really good point about making sure there is something they miss. I'll ask more questions. We've already got a couple things (ammo, people, etc, but I'll make sure it's something they love all mighty). As for other exits, they've all be barricaded, collapsed or otherwise closed off already. Part of making it defensible was limiting access in the first place.
Yeah, you're right, 10+ should have some good results. I'll give them a question they can ask, or something like that.
Can't wait till they head out to Ash Heap.