OK, a disturbance free night of sleep and I'm feeling much more optimistic.
Tested draft #1 of the solar oven out with mixed results. I modeled this one of the simplest design I could find, which probably works great in Arizona, but not in New England. It was also the cheapest design costing about $4 for the saran wrap and aluminum foil. I tried heating a cup of water but the sun kept going behind clouds and, while the water did get very warm over the course of a few hours, I'm not sure it's the most effective method. Next time I would use Plexiglas instead of saran wrap for the cover and black sheet metal for the lining, so the heat is held in even when the sun disappears for a moment. I'm not sure which oven design I'll try next, but I'll keep you updated.