advice about wireless star topology network structure

Hi there,

I need opinions about my network (still small but it will grow). Here is picture:

At main location I put a few nanostations looking to each village, every NS is connected to an mikrotik 493 ethernet port.

I have some villages but schema is like village A example at image.

by now everything is in bridge mode, at villages NS and the bullet (AP) are in bridge1. At main location the same, NS are all bridged with internet interface.
I put a dhcp server at main location (10.5.50.x/24 range) and main router is doing nat masquerading this network.

I think it will be better routing networks, so each village will be in separate network 10.5.50.x, 10.5.51.x, etc… and I can identify each client via its ip.The problem is how to do this at mikrotik 493, create a masquerade rule for every net? o a rule including a wider netmask?

I also want to put radios in a separate net so clients can’t have access directly but i want to access every radio even outside the net.
Same thing about routers, I want to access every one and they can be visible among themselves.

So what do you think ? VPN, VLAN, routing, The Dude?

Thanks