Dang. After googling info on these units, we've decided not to add a grill - if you forget to empty the drip tray, you get lots of grease all over the place (we get lots of cruisers go by so it's a heavy wake zone sometimes). We also don't want to dump grease into our boating waters, and we have nowhere to "beach" to grill, so for us and our boating areas it's a no go I think. We'll just stick to deviled eggs and sandwiches when on the water - yum-yum.
Now camping with the boat is a whole different scenario...we grill up a storm over a wood fire all the time when camping - shrimp, crab legs, steak, burgers, corn in husk, you name it...yum!