Keep it simple or you will find ways not to use it. I would ask yourself these questions:
- How many people do you cook for camping?
- What do you like to cook/eat camping? Breakfast and dinner?
- How much space do you want to devote for storage?
For example, I still cook for 5 people camping, those combo grills are far too small, they are good for 2 people, maybe 3 max. I also love to cook a good breakfast, with a griddle I can cook 2lbs of bacon in one shot, throw some eggs or pancakes on it as well..........zero dishes when done. Cover griddle and go for a ride. The days of us doing big pieces of meat in the desert don't happen anymore for us, I'd rather keep it simple nowadays. The entire family loves a good bowl of friend rice with Spam for dinner, easy and filling (good leftovers in the morning with a fried egg). For Carne Asada and Philly Cheesesteak, I slice the meat (or buy) at home, throw into a zip lock and cook it that way, super easy. Then grill up some onions, peppers as well. Again, no dishes camping, use much less water as well.
If you do still like to cook steaks, chicken, ribs in the dunes, then you will need a Barbeque IMHO, the griddle is doable but not my fav. At home, I no longer even have a gas grill, green egg and big griddle are my go to's. Charcoal for barbeques are hard to beat.
Good luck..............I went thru this self-realization project three years ago.