Its probably better not to go on the very first hunt, (nov. 15). If you have a choice try for the second or third hunt. around the end of November. It won't make any difference as far as how many antlered bulls you will see. The last couple of years the caribou haven't shown up until the first week of december at the road. If they are not yet to the road, you are S.O.L .- there is no way to walk throught the snow for 100km to get them, you can't run a snowmobile back to them for the same reason- no trails, lots of rocks, if 2 guys go hard all day they are lucky to go 20Km and back- trust me I tried.
If they are not yet at the road, you will still be able to get caribou at mirage, but they will have to fly you in with a helicopter. They usually take in 4 hunters at a time, drop you at a lake infront of the catribou, pick up the last group that they dropped off, and swing their 8 caribou in a net underneath. You get about an hour to hunt(depends on how far they had to fly you from the road). 2 years ago the price was $1600 per hour for the helicopter- It is NOT included in the $1500 + license deal you are talking about.
The drive is brutal, there is no other word for it. Make sure you can lay down and sleep in your vehicle. Book a room at Raddison, or Ruole Rouche right now if you want one because there are only 2 places to sleep and they will be full if you don't reserve well in advance. DON'T underestimate the drive. We drive from london to Red Lake every year for moose hunting (2500KM one way) and it is a cake walk compared to driving to LG4.
Mirage is by far the best outfitter of the 4 that are in that area. (Nouchimi, Asselins, and Kissemoung are the other 3)
All of these things said -if you time the migration right is is truly awe- inspiring to see the barren taiga come to life with thousands of caribou.
If you want shoot me a PM and I can answer pretty well any questions you might have for that hunt.