RE: Migration
The issue with snowmobiles depends on the animals. If the migration is even close, you will hunt from the roads and short runs into the bush and will not need a snow machine. Bring a game sled to help drag the big boys out - not fun with fur on the snow.
If the animals have gone by you will need a snow machine and go out many miles looking for them. Since I cannot move my brain into that thought process this year - I would say rally look at the extra tow gas, potential issues, slower going, etc., etc. against a 160$ day rental that comes with a helmet and gun case. The machines are also Scandics that basically do not get stuck and can blaze a trail through areas that most machines will get stuck.
One reason that thelodge (Mirage) does not offer any snow machine packages before 04 DEC (1st leg of the second hunt) is that you will not need them. Based on what we are seeing with the herd I would say to leave the machines at home. I have seen and also been subject to some major issues with trailors and a particular one was with a nice new 2 up covered sled wagon that we thought was the answer up there - not so - we have a slightly bent axle from the "road" and we kept blowin our tires from riding on the side wall. Made is through 4 tires and to St Johnsbury VT where we were dead on Rt 91 S after 38 hours of driving straight. We had a tow come up from Nashua and we made it home at the 45 hour mark. I usedto think this was the worst trip, but last years is now in that spot.
I suggest looking at the migration as mid-late Nov is on us and decide then. I see animals all over Laforge 1 and even to the east of the Laforge road which has some nice ponds and open areas to hunt.