Maybe, I have tried camping there right after ice out.. half of the sites were mostly underwater.and the ground too soft to drive on without a winch.
You are right of course, even in season in a good rain, most of the drive-in sites can be miserable boggy places. (Robin) I hadn't though of the Ranger recommending that open turn around area, sometimes the snow berms take a while to melt away, leaving that whole area pretty wet too. The options up there are pretty limited.
I am working again on a winter group campout and hope to get agreement from a different ranger (and planned camp area) with a permit pulled ahead of time...sometimes though what works for 3-5 in a small group is not palatable for them if 10-20 folks are planing on being in attendance (parking, garbage, sanitation, etc). And mud season; bad for everyone, roads, people, campsites. I'll report back when it all comes together, or not.
We had a scout group interested in doing a late fall campout and I was surprised to find not one single ADK NYS campground open after about the 23rd of October. That is pretty late in the season, gonna get cold, dark early, maybe even some snow, but that is exactly what the group is looking for...heck, even CT has at least one campground open until New Years Eve...been there done that!