Personally, I can't imagine packing up and moving in the middle of my trip, expecially if it's only for 4 nights. You end up wasting a lot of time. If I were you, I'd stay at CSR (our favorite moderate) and not bother with the move. I know a lot of people do it but it just doesnt seem worth it unless you are going to be there for a while and want to move up to a delux. Anyway, CSR is a great resort. To me it more of a delux that was built out instead of up. It has allof the amenities that the delux resorts have and a bigger food court. The bus system is very good and, since it is a convention hotel, there are usually fewer people on the buses and in the pools. Also, in case you're worried, the conventioneers are not a bother as they are usually back in the convention hall which doesn't impact the regular guests at all.
Have a great time whatever you decide.