go to www.mousesavers.com they show the room only discounts and when they can be applied as well as who can use them. and yes you can make room only reservations. I do it all the time. Otherwise, us annual passholders would all stay elsewhere!
I don't know how to add links but, you can look up room only on the walt disney world website. We did! It is under Fall Fling and we found a great rate at the Poly. Concierge GV for $255 a night with tax in August!