We went to the RV Supershow in Tampa yesterday and all the 5th wheels we looked at had the island in the kitchen. We think that takes up too much floor space.
We have a good size island and a French door 20 cu Ft ref. Which we no trouble accessing when we travel. My DW is make it from scratch cook we don't even use our grill. It all depends on ones own taste. Oh yea the sink is in the island also.