Actually it wasn't a typo! :E Need to drink my coffee before I post!
Datasheet (pdf)Looks like 2.4ghz is limited to 500mW. Anyway that should be more than enough for this area at least. 100mw is all I need here. I played with finding more networks last night and probably found 20 to 30 different SSIDs that I never had seen before. All of them about -70 to -80 "RSSI". Usable signals.
The 2.4ghz band is solely for bridging the network, not repeating it here in the camper. The small antennae that come with the router are used for the 5ghz private network.