My TT came with a grill and a rear bumper mount. Used it once and it barley cooked hot dogs. I looked on CW and did not see anything for bumper mounted grills. You can find info on waxing and the radio refit by using search - have seen a couple of posts regarding wax in the past few days alone. not sure about the convection oven - it's more fun to cook over a fire/grill when camping to me. We don't use the microwave except to heat up leftovers.
I also Googled rv blinds and curtains - lots of results. check it out and happy camping!