Dude, just looked up Bamaga, you are way up the Cape.
I lived in the Alice back in the late 70's, I was just a kid, I was 15 when we moved back to the states.
Made it to Cairns as we where moving back to the states, Dad and I drove Mums Holden around a bit and flew out of Darwin.
I conned my Dad in to taking me to ride the Gulflander (train between Normanton and Corydon if anyone is trying to look it up).
I'm a big railway enthusiast, Gulflander was the ride of my life - like a page out of the 1940's.
My impression has always been the further up the Cape you went the deeper / longer the bogs would be.
I'd love to see how your using your P500.
Maybe set my view of the Cape straight!
Welcome and thanks, enjoyed thinking about Oz and looking at the map for a spell
(well, I tried to throw in some slang but haven't figured out how to spell color colour)