Wecome John, out of the pan and into the fire. The first thing I must say is, as an engineer for Hamilton Beach, please refrain from putting an Mr. Fusion on the decklid of your GL.
Sorry, I just had too.
Sound like you have a full plate. I would call the 912 with the 3L 6cyl. a 912/6, like the 914/6. You have the camper to take with you to the show along with the GL so you can sleep in it and haul all the swap meet stuff home in. Last year I had to beg someone to haul my interior home for me, couldn't get it in the bug I drove, it was already full of stuff.
Welcome aboard.
GL Forever