We stayed at CSR in October and we were in Cabanas 8B in the back and we were able to walk about 30 yards tops to the bus stop. We were the 3rd stop and did not have to wait a long time to get there while they dropped off other people. The parking lot was really well lit as well as the hallways.
I compared the maps of the 2 resorts and it looks like to me that the bus stops are pretty much the same distance from each set of buildings for each resort. Sure, POFQ has fewer buildings and rooms, but it doesn't appear to me like you can walk out of a majority of the rooms and get right on the bus - haven't stayed there in awhile so I can't remember how close we were to the bus stop. I do remember walking back to the room at night and it was pretty dark.
I've stayed at both resorts and they are both nice. They both have nice theming. If I was going during a busy time, I would pick CSR as they do not share buses with anyone.
Although you can't guarantee a room request, I would ask the front desk to try and place you nearest to a bus stop, especially if you are worried about traveling alone.
Please don't let the quantity of rooms at CSR scare you away. It is a really nice resort with great amenities - great food court, spa, fitness room, lounge, HUGE gift shop, marina, beautiful landscaping, QUEEN beds!!!!
Regardless of your choice, I hope you have a great trip!