I was just able to book through David’s for early December 2020. It took almost a month to get a match but I was able to get what I wanted (1br lake view BLT). I did have reservation requests with both companies and as soon as David’s booked me and sent the confirmation number I emailed to cancel at the other place and was refunded my 100 deposit. It was stressful waiting but it paid off! I had also booked a room at the contemporary through Disney as a back up but cancelled that as well bc I knew our dates weren’t flexible if I was unable to get David’s. Good luck!