There are a lot of variables in play in terms of costs. Fly-in, outpost deals like this one are typically more expensive than drive in. However being an outpost (no onsite staff, no lodge, no dining hall, etc.) means you bring in food/beverages and prepare your own meals which typically results in a much lower per person food cost (vs. "American Plan"), depending on what your group chooses to eat. Other cost variables are license, bait if you choose to bring, gas for the drive up, a night's lodging after your long drive up the night before flying in to camp.
Generally speaking, with all costs factored in you can 16 baught 16 a great trip similar to this for around $200/day/pp.