I was looking into this but finding a mesh AP that you can run from a 12v battery pack is more of an issue for me and if you did it would probably be a poor mans Chinese one with nasty range.
If a mesh network would work (and I see no reason why it wouldn't) you could setup a very large area with multiple units.
I would make sure that the MAC address was locked to a static IP though as my biggest concern would be that it would change IPs mid flight and the app would lose connectivity.