My 9 year old DD hated sleeping on the sleeper sofa at BCVs even though she loved SAB. The next year we stayed at YC so that we had 2 queen beds which she liked much better. I'm not sure how comfortable your 14 year old will be on that sleeper sofa. When my DD was much younger we stayed at OKW, we liked the resort pool, the large bathroom, the theme and the boat to DTD but the lack of an indoor food court was definitely a drawback. As far as transportation, being able to walk to DHS and Epcot from BCVs is a huge plus but we did find the buses from OKW to be adequate. Are you renting points and that is why you're staying at a DVC property and not a regular WDW resort?