I suspect this as well. If anyone has gone recently, I'd love to hear about it... Seems like Knoebels' lack of a traditional single entrance / access point would make the rule more difficult to enforce.
Since the pandemic began I’ve visited Magic Springs, Alabama Adventure, HP and Knoebels. Shockingly, Knoebels was by far doing the most to keep the park clean. Rides go down atleast once an hour for cleaning, every employee is wearing some kind of mask or face shield and new sanitizing stations all over the place. There’s also distance markers placed in every queue, which most people were surprisingly obeying. Not that the other three parks weren’t doing a good job, Knoebels just seemed to be going above and beyond which was awesome to see.
The only sad part about it all is they are assigning rows for twister and Phoenix to help reduce clutter in the station and space the rows out. Requests for front or back are not accepted.