For quite a number of years I have flown with Northern Wilderness (northernwilderness.net) out of Fort Francis, Ontario, Canada (just across the border from International Falls, MN). As was mentioned, there are different kinds of fly-in fishing. Northern Wilderness is almost exclusively an outfitter who will fly you to their cabin at a remote lake, drop you off and expect you to fend for yourself for much of the week, then come back and pick you up. We always asked to purchase another day for a full week. Their reservation schedule is almost always booked a year out from a specific date, so if you want to go August 1 a year from now, then you are already too late unless your willing to play pot-luck on a certain lake (some lakes are more popular than others, but all are good fishing). Their prices are on the website. They also have a facebook page. They have been doing this for over 40 years. The cabins I've visited are usually quite well equipped but are completely off-grid. Water is pumped from the lake and is fairly clean. Solar panels provide electric power. Propane stoves and refrigerators. The toilet is old school pit toilets, so be prepared for the stench. There are usually fish filleting stations near the dock (bring your own knife and cutting board). Though the bears and gulls (and eagles) don't care where you leave the fish guts, you will be much safer if you haul the guts elsewhere and keep leftovers out of bear reach. We always brought mousetraps with us. There was usually peanut butter in the cabin (leftover from other campers) to bait those traps with. The areas around the cabins are usually less populated with flying insects, but bring the DeepWoods version of your repellant (but keep it off your hands, as the fish can smell that stuff).