It's going to be tough to get into the 10K I suspect, but I don't think there are huge numbers of Club runDisney folks. If both you and your wife are planning to run, I'd have both of you on the computer at exactly 10 am Eastern and each try to get in. Once one of you hits the registration page, then just register both of you on that computer. It won't be impossible by any means (likely not as hard as getting a Rise of the Resistance Boarding Group), but with pent up demand and the 10k being a very popular distance and a smaller field, it's going to require good timing and some luck to get registered I suspect.