Crowe,
I would recommend giving Ken the owner of Insch a call if your planning on doing a few flights. He can give you a brief on getting in and out of the strip safely.
Its not so much the fact that Insch is a short strip its more to do with the areas to avoid overflying, surrounding terrain, associated rotors and powercables on short finals.
I'm not sure what version of PA28 your planning on using but I would think Insch would be tight in a 161 Warrior with anything more than 2up and a decent amount of Fuel.
I own a share in a C172 based out of Insch and I wouldn't really recommend trying anything more.
As for Edzel one of the chaps in our group landed there a couple of months back but I'm not sure what the situation is myself to be honest.
Regards
UA