If I remember correctly (I have to check my signature!), we have done 4 in 9 days!! I think we started out with Hard Rock Hotel for 2 days, Royal Pacific Resort for another 2 days, then on to WDW CBR for 4 days and 1 day at CSR.
I thought just in case we didn't like HRH, we still get to stay at our favorite resort RPR. Then at CBR, we had a problem there and we were not happy there, so we ended up switching on our last night at CSR. CSR saved our stay WDW.
Would I ever switch that many time in 9 days...never again. I would probably do 2 resorts in 10 days. I don't like moving too much. It takes too much of our time from having fun and it's a lot of work from checking in, out, in and out....packing and unpacking.