Here's an update:  The spaghetti turned out great but I made too much.  Leftovers isn't a problem around here but I'll have to scale back the amount I fix for camp.  The tomato powder was super simple - just add water!  The pre-cooked hamburger worked great.

Desserts turned out good.  Unfortunately, not everyone likes rice pudding.  The vote was a unanimous YES for the baked apples.

Experimenting paid off with the garlic pita bread.  I burned it.  I had pretty hot coals & left it too long.  I think we'll wrap it in foil & heat it in a skillet in camp.  It also needed more garlic.  But now we know.