Do you have a list of fax numbers for the resorts? How do you word your faxes to be reasonably successful at getting your requests?
The only resorts I know for sure accepts and reads faxes is POR and POFQ. Your best bet is to call the main reservation line and add any requests to your reservation. Just describe what you want. "Upper Floor Close To Elevator ", "Corner Room Close To Food Court " for example.