Leavenworth area snow report:
Snow is still pretty thin in immediate area, there is about 5" in town (can get an idea from this website <skileavenworth.org>), probably less in Derby Canyon area which is about 5 mi east. Obviously we could get some dumps in next 3 weeks but immediate forecast not great, looks like yet another pineapple express this weekend. Snowpack at Stevens Pass area is about 50% of normal, but that's still about 3'.
If we don't get enough snow in Derby Canyon, one possibility for your play-in-the-snow day might be Smithbrook road (FS 6700) about 3 mi east of Stevens Pass. It would be a hassle, it's about 30 mi from Leavenworth. DOT plows a wide parking are a couple hundred yards east of junction (snowpark pass not required) you could probably fit rigs and trailers in, especially since since you could double park. However there are a lot of potential problems. You would have to get there early, on weekend it's a popular snowmoble and backcountry ski location. Also, there is not enough space between guardrails and creek for a cat, so you would either have to run them up side of road, or unload them at junction and take trailers back to parking are which involves a 5 mil round trip since highway 2 is divided there (like I said, it would be a hassle). You can look on Google maps satellite to see a summer shot of parking are, there is a car parked in it so you can get an idea of its size, there is also a winter photo of it. Might not be practical, but it's all I can think of where there would be a possibility of parking all the trailers. One more thing, on a day when avy danger is moderate or above there is a stretch about 3 mi in where road goes up to Rainy Pass that you want to avoid. On a low avy day you can go for 20mi,