Worth stopping in Yellowstone Park at end of October?

It is well worth the stop if sites are available and on or near your route. Yes stuff is closed and crowds are small. Critters are out all year except for bears and some small stuff like Picas. The wolves will have moved more northerly within the park and may be hard to find. Other big guys are out and about. Lots of elk near Old Faithful geyser. OF Lodge may be closed but the Snow Lodge will be open. Be careful and head the weather reports as the snows can be heavy in that time frame.