Nick, great idea, but you'll need to be a hardened stick-and-rudder-supremo-bush pilot before you can do that sort of stuff. Wacky stuff including getting into and out of impossible strips with wildebeest standing about on them whilst at loading/CofG limits, temperature nine zillion degrees, running the engine on lighter fuel mixed with gin etc etc. NB no personal experience here, but have talked to some blokes who've been there and done that. See some of the discussions, and refs to bush flying websites and books, in Aircrew Notices and the Africa fora up above. Long term plan might perhaps start with getting some commercial qualifications and trying to work in Canada or Alaska to build up back country experience? A noble aspiration, but unlikely, I suspect, to be achieved rapidly.