so I just wanted to follow up here. Went down there last week, got to the location and they did notice I was a PC, and "upgraded" me from my rav 4, which would hold all my suitcases and backpacks, to a optima, which held some of my suitcases and backpacks.
Overall it was a decent car, and on the island was more than enough.
However, there was 1 tangible benefit, and its not supposed to be there. We didn't know the island only took cash at gas stations, and we only had enough cash to fill it to 6/8. got back to the counter and the lady there said don't worry about it, and sent us on our merry way.
either nice or a benefit, made me happy for avis.