I said this is for Aaron what are you doing looking at this???? Just kidding. lol.
See what I mean about digging in front of the shelter's?
I think this picture makes these shelter's look small but they are plenty big enough and have black ceilings.

Yes sir I do see what you mean ....I had pictured something a tad bit different...I can see that there may be a foot or so layer of dirt on top of bedrock just right in front.....Never know till ya try....Good luck