I'm going for the Princess half marathon in March and I spent yesterday on the phone with Disney pricing out the best options as far as how long to go and which deal to go with (all at moderate resorts, namely POR).
For 7 nights, out of the 4/3 deal, the princess race discount, and the 35% off moderate resort pin I had, the 4/3 deal is the cheapest/best deal.
We're saving for our wedding, so even though the 4/3 deal was excellent ($1378 for 7 nights at POR w/2 7-day tickets!), we decided that we shouldn't be spending that much right now, so I also priced it out for 4 or 5 nights.
4 nights at a moderate w/2 4-day tickets using the race discount was more expensive than 5 nights at a moderate w/2 4-day tickets using my pin code.
So I think we're going to do 5 nights at a moderate with the 35% off the room and then book our tickets using the race discount.
Hopes this helps anyone else who might have been wondering which the best deal was...