Hmmm......II'm not familiar with these places, your skill level or ambitions but my best advice is practice slow standing driving and tight turns standing. On flat ground for starters. These exercises improve balance and in time transfer to muscle memory that can compensate for unpredictable fish tailing and loosing traction. Also work on your ability to dab a foot while riding standing. Sometimes your bike kicks out sideways and you need to put a foot down which can be done with control and feels a little like pushing yourself on a skateboard.
Another thing to consider when riding is weighting and deweighting strategically to gain traction and smooth out your riding.
Picking your line wisely will minimize the difficulty of your riding but even picking the best line takes experience.
If your weight is more then the suspensions intended weight then you need to compensate for lacking suspension with your legs. My weight is under the intended weight and I still need to stand and use my legs as the stock TW suspension travel is very short.
If you really want to challenge yourself riding in a few inches of snow is like light mud only cleaner and by the time spring thaws your riding will have greatly improved.
Watch instructional youtube videos like "Cross training enduro skills" or "Heddletowns enduro ride" for example.