Burgess Junction area status:
Current conditions are extremely windswept. All of the obvious places to go are tracked up, so you really have to look around to find things. I'm sure if you know the area you can find stuff, but if you don't I wouldn't bother coming out.
There isn't really any snow north of Burgess Junction. The only semi-decent stuff is south of Bear Lodge.
I spoke too soon. I was out there from 30th of Jan to today, and on Monday and Tuesday the person who lead the group only knew the area north of Burgess Junction. Since there isn't much snow up there we spent the first couple days roaming over hardpack and wandering aimlessly down steep hills covered in rocks.
On Wednesday morning I started looking for north east facing slopes guarded by trees, and marked them on my Garmin Colorado 400 that I had fortunately loaded a whole boatload of satellite imagery and topographic maps onto. From Wednesday to today I was able to keep us in some really good snow.
West of Bear Lodge things are quite windsweipt, but we spent a half day in the area. If you go north of that really open area that seperates it from the south you end up in ravines. Most of those ravines are hardpack, but if you look hard enough some of the meadows are mint. At one point, after passing through about 50 feet of trees I managed to get us to a cool little meadow with about 3 feet of untouched perfect snow on it. So if your in that area there is some mint stuff, but you have to look really hard, or cheat with a GPS.
South of Bear Lodge there is some really good stuff on the side the ridges. The northern part of that area south of Bear Lodge is heavily trafficed, so you have to go high up on the ridges to find stuff that isn't tracked up, but it is there. South of Owen's creek on the West side of that highway that goes south there is some really good stuff to climb. The snow that they got mid week really made that stuff good, but again, if you get up on the side of the ridges, on the north eastish facing side you'll find awesome stuff, including some decent tree riding. In general this area has a lot of climbs that are more open.
South of Bear Lodge and east of the highway that runs south I found some of the best tree riding I have ever done. The snow in the trees is stupid deep, and off to the sides of the many forest roads there are awesome treed areas on slopes that are boatloads of fun. I even managed to find a couple of meadows out there that were mint.
In conclusion:
Conditions are good right now, but you have to know where to go. I don't know how many people at Bear Lodge I talked to that ended up trail riding mostly since all of the stuff near the trails is either windswept or tracked up.