I'm just randomly pricing Disneyland vacations for the last weekend of September. How are the crowds and weather at that time? It would definitely be a weekend stay, to fit a quickie trip in around work.
Also, how kid-friendly is the Tropicana Inn and Suites? My daughter will be 2 and we recently had a great time at the Paradise Pier (recently = April) so I'm going to be comparing it to everything over there.