Aruba RAP Question

Hey all,

I have a remote employee that needs multiple RAPs at his home (large house). At HQ we have a 7210 controller on AOS 8.10, with various campus APs connected. This 7210 is behind a Meraki firewall.

I want to deploy 3x AP315 at the remote site, but am wondering how roaming and survivability will work when the controller goes down. We are deep in the country side, and our primary WAN goes down from time to time. Will the RAPs stay up and alive if the MC goes down? I am not planning on tunneling traffic back to the controller. Also, does mesh and roaming work well like the campus APs?

Thanks!