We have a one butt trailer. No slide and limited space through out. My DW and I split the cooking related duties similar to how we do it at home. I do most, if not all of the cooking and she does the clean up.
A lot of my cooking is done outside too, so the kitchen really doesn't make that much difference to me. I prefer to cook on my camp stove and in my Dutch ovens. We don't have an oven in the TT anyway. I usually set up a cooking table where I do my prep and cooking. I may occasionally ask the wife to hand me something out of the fridge, but I now have a Coleman 12V cooler/warmer that I keep outside.
We are in the market for a new TT and one of our primary criteria's is an outside kitchen.
Of course we generally only camp on weekends and a 2 week vacation during the summer. If we were full time then I would definitely want a large indoor kitchen, though not necessarily a 2 butt one, since I still prefer to do all the cooking by myself.
Oh...almost forgot to add. When I'm planning my meals for a trip, I often prepare as much as I can in advance such as chopping, etc. and store in either Ziploc bags or I now have a food saver that vacuum seals foods. Actually I frequently do this even when I'm not camping. For instance, if I'm preparing fajitas for a meal I will usually cook 2-10 times as much as I need and freeze the rest in various portions that I label with contents, date and # of servings. If I'm chopping onions, peppers, etc. I always store the extra in vacuum sealed bags as well. With a little pre-planning you can make anything work for you.