I like the second logo.
As for name, i like Guatemala Mayan Outpost. Dropping the Imperial sounds short and sweet.
There's already a Mayan Squad in the 501st so not sure if they allow duplicates. There's a Yavin Base in the Rebel Legion as well.
In any case, above is just my 2 cents and shouldn't affect your final decision.
All in all, i'm happy to see a formation of a new outpost. 501st influence spreads to all corner of the world.