I've had the joy of skiing in Les Portes a few years back and loved every part of it. My wife and I got a place in Champoussin, on the Swiss side (which is literally the far end of the entire Portes Du Soleil entire map coverage). When you need a ski map, there are four of them to cover both France and Switzerland.
Getting to Champoussin is a challenge but also an adventure. If you dream of ski in/ski out, this is THE place: we stepped out of our building every morning and skied down to the one and only access T-bar to go up into the first mountain (don't worry, it is never crowded and very reliable). I would recommend Champery, if you want to stay near "ski civilization", but, if you are a true powder hound, I can't think of a better start to my ski day.
Being on the far end of an "8 resort" region is both amazing and challenging. While we are not young or ski racers, we can ski fast and anything (reds and blacks) that Les Portes offers, except "The Wall/Le Mur". Even from far away, you can tell, it is long, moguled and STEEP.
What is amazing is that it is impossible to go from one end (Champoussin, Swiss side) of the region to the other in France (way past Morzine) in one day. So, you have to plan your ski day and know where you are going, stop for a bite and, turn around and ski back. What a blast! No time to do the same run twice.. it"s GO GO all the way and back!
We had booked another trip during COVID and it was cancelled (winter of 2020). One final image: it is the only place, other than when I heli-skied, where I felt that I was skiing in the middle of nowhere and on top of the world... truly a dream.
