Expect snow, at least still sitting around.
Depending on the winter not all of the park might be open. The
plan is to have Fishing Bridge Campground open by then. But it might not.
Not all of the campgrounds will be open by then.
They don't plan to have everything open by then, so there will be limits on what you can do.
I'm not certain the Fishing Bridge will hold your rigs, but I am fairly certain none of the others will. In fact you might want to stay outside the park.
2008 F350SD V10 with an 2012 Arctic Fox 29-5E
When someone tells you to buy the same rig they own, listen, they might be right. When they tell you to buy a different rig then they own, really pay attention, they probably know something you don't.