If I were you I'd start contacting them NOW. A friend and I had a Hell of a time a couple months ago nailing down anything. We are actually going with Shadow in 2021. They are just a transporter so you'll have to do the research of where to get dropped off. And while you used to be able to get a decent outfitter to do some scouting and drip you off in front of movement more and are going that way. Brooks Range Aviation seemed decent too, they appeared to drip you in places they'd seen movement through. Bushwacker has dropped off the radar completely, which seems to be a good thing. Arrowhead is so up and down I'd avoid them. I have heard both horror stories and good ones. I had a couple others I tried to contact and they just never got back with me. Not impressed with that. Oh, and be prepared for $3-4K cost. Yep, it's gotten pricey. I paid half that in 2012 on the North Slope.