RE: Sopwith Camel Stability
I'm flying a VK (pre-Proctor) Camel. It's a delight to fly. Yes, it is a WWI tail-dragging biplane and needs coordinated aileron and rudder to fly properly, but take-offs are no worse than any other tail-dragger and landings are pure joy as long as you keep some air flowing over the tail surfaces. I have well over 100 flights on it.
If you're looking to fly a small electrec powered Camel try the WWI forum on Wattflyer. There's a bunch of knowledgeable and willing to help guys on it.
Walt