My sides will be 10' 6" long x 68" high which will go down below the frame to cover the sunken floor and under-the-frame storage compartments....kind of like channeling a hot rod. I'm having a galley inside in the front so in order to be somewhat comfortable using it that's the height I ended up with. I've done a lot of mocking up with different seating and countertop arrangements and I'm comfortable with the design I've got.
I figure there are ways to make the large sides similar to what Steve F is doing with Mike's Lil Diner by glassing sheets together. It won't be considered a teardrop but it will suit me no matter what it's called.
One of these days I'll have to post my plans but they're just pencil drawn on graph paper.