It’s gonna be bony low. Penns is low too, but not that bad. FF, unless you’re talking wayyyy upstream where it’s probably little more than a trickle right now, is mostly stocked fish, and many (nearly all) don’t make it through Summer.
Between the two right now, I’d go with Penns. More water and more fish, even if there aren’t a ton of bugs this time of year. Easy decision IMO.
In the Spring FF is an awesome stocked stream. Up there with Kettle/Pine/etc. I’d make a trip up there next May. It’ll give you a much better impression for your first time up. I really like FF. Just not super low in November, if that makes sense.