Sure, why not? . . . (more)
If you let it set overnight, slightly undercook the noodles and add just a little more water all over the dish before cooking. Should be fine. Cover it with aluminum for at least 3/4 of the baking time to keep moist, then uncover for a while to brown.
As for the meat eaters, if you use enough cheese, they should be pleased. Make sure to have extra grated parmesan to sprinkle on while dining.
I would recommend layering the cheese as a middle layer, between to layers of the veggie mixture.
Stuff like this I make pretty frequently; husband loves him some mass quantities of pasta so I think of it as a lasagne-syle pasta dish. Basically, it is a baked rigatoni with lotsa veggies.
And no matter what you call it, it looks delicious with all those veggies and the ricotta!