I researched for two years before our hunt. The reason I chose Northern Air Trophy was every hunter I spoke with that used their service had a good experience and most of the hunters I spoke with that used a different service said they wished they had used NAT because of the quality of the animals they took versus the animals of the hunters that used NAT. I purposely did not contact the transporters and ask for a referral list. I asked for references over the internet and made phone calls to speak with hunters directly. I figured that was the best way to get accurate information. To be honest, most of the complaints (and there were very few) about any of the hunts had more to do with hunt circumstances rather than the transporters. Weather was the biggest issue, so be prepared for anything. The only weather that you cannot overcome is fog, but the effects of rain, wind and snow can be limited by good gear. You also must be patient with your travel plans. I promise you will have plans go sideways somewhere along the way whether from commercial airline screw-ups or grounded transporters.
I'm not making any judgements, but a lot of hunters see the lodge hunts in Quebec and think that's what caribou hunting is all about. Being flown in ahead of a few hundred caribou and dropped, or being boated in every day, and waiting for something to walk by is far different from flying in 24 hours before hunting and being limited to what your legs can do. If I had the money, I would go one last time and I would book with Northern Air Trophy without question.