Coldfinger, I want to clarify a few things.
The $900 version is the Mavic Air 2, A Mavic Pro 2 is $1,600.
The Air 2 has forward, backward and downward obstacle avoidance, the Pro 2 has all those but side, and upwards also.
The mini is small enough to fit in a pocket but I wouldn't advise that unless you can keep it warm. Once the batteries get cold they have to go through a warmup cycle before you can fly and then your flight time is reduced. When I had my Phantom 3 I put handwarmers in the case to keep it warm on the trail ride in. I then tried to use it first thing in the morning before it got cold.
I just ordered a Mavic Air 2 and should be here this week. I plan to get a compact case to fit in my BCA Float 22 bag. I'm planning on heading to WY on the 14th, if all works out I'll give everyone an update.