Sounds like you are on the right track. An I/S should suit your needs and the "L" will be the same 158 sq. footage as the other categories, it will just have the extra bed. It should come down from the ceiling area so won't be a space problem for you. As for a specific location, that's a burden I put on your T/A. We just booked a family where I lucked out and got a premium location that didn't cost either of us anything extra but sure made them happy. "RCI" doesn't allow disounting lower than their fares so it's the least a good T/A can do for ya!