If you're looking for a discount at the Poly, in September, consider checking rates through
AAA or purchasing Annual Passes. If you are a FL resident, then check for resident rates, as well. They have
Free Dining, during this time, but I don't recall seeing a rate for deluxe resort guests (someone please correct this, if I'm wrong). But, September is in the value season, so the rates are great during this time of year, to begin with
Also, I think the maximum at the Poly is 4 per room. Although, I don't see a problem with 6 because of the sofa daybeds that can be converted into an actual bed. We've stayed at the BWI-Club, with 3 Ad/3 Ch, for New Years before. One of the value resorts have Family Suites- I think its Pop Century, CSR has suites and AKL has bunk beds, but this may not be a good choice with 3 adults. Have you considered renting points from a
DVC member on the board? This is, also, a great option to stay on property, get the dining plan and save a lot of
money
I'm not sure what you mean by "why don't they do mousekeeping?" Mousekeeping=Housekeeping. All resorts have this service.
Happy Planning
