Bring a bug shirt with face screen (great Canadian bug shirts are good -may want to consider a therm-a-cell) bugs can be bad or none existent depending on the temps, it can be very warm (+30'C or cold (around 0 to +10'C) so bring a variety of cloths (usually layers), rain suit, If the outfitter is on a lake or river bring a rod and reel, you will be able to supplement your "furnish our own food" with some fresh walleye or pike. as far as food, I would likely stop at the last larger center before the camp and pick up food, etc. most bear hunting is stand hunting, bring some reading, and a good cushion and back support.
I was not sure if you wanted more food suggestions or gear suggestions, so here is a little of both.