You will not need to write the test to get your BC hunter #, if you already have an Ontario hunting licence.... just go into any BCACCESS centre and get 'er done.
As for moose hunting around Prince George, I would suggest not if you're wanting to get away from crouds..... there are moose around PG but it gets hunted extremely hard.
Go WAYYYYY up north..... as far as your wallet will take you. There's more moose, bigger moose, less hunters and most of the MU's are open bull (meaning no LEH tag required, all you'd need is a moose licence).
Cheers.