I think the effect of the relocated parties will be negligible if you are staying at CBR or CSR. POFQ has approx 1008 rooms, CBR has 2112 & CSR has 1967. I doubt that POFQ was "full" (maybe for certain time periods but not for the whole summer IMO) so even if it was you are talking about relocating the ressies. Some might choose to move to the AS's or might upgrade to the deluxes. I would especially think that CBR would be affected very little if any because of its sheer size and number of rooms.
Just my .02!