Thanks for the post, Marty.
Sounds like I need to get back up above Falls Rd. I've been exploring the stretch near Masemore recently, and fished yesterday below York Rd. If you put up with the occasional kayak and canoe passing by, that's a good stretch that isn't too heavily fished. They were hammering a size 14 tan EH caddis with a smallish (20-22) beetle tied off the back. Didn't bring any to hand - one of those days - but the fish are there.
Agreed, though, that the Gunpowder trout love those caddis in the 10-16 range.

Tight lines,
Dave