We've stopped at the Disney Information Center in Ocala a number of times and have always been able to get a discounted deluxe resort room there. The discounts have ranged from 20% to 45% off of rack rate. We've never tried for a moderate or value so I'm not sure what else might have been available.
Last Fall we managed an AKL standard room at the $134 rate - and were lucky enough to be upgraded to a Savannah view on arrival! Gotta love that kind of Magic.
They will not give out any information over the phone, and if you have an existing reservation they will not change it to a discounted rate - unless you are 'upgrading'. Typically I will make a reservation at a moderate resort and then get it 'upgraded' to a deluxe at Ocala - yes they will transfer your deposit.
We've asked for/been offered the Polynesian several times, the GF once (we ended up switching to the Polynesian when we got to WDW

, the AKL once, and the FW Cabins once.
It takes about 90 minutes to get from Ocala to WDW so from where we start from it makes sense to just stay the night in Ocala. There are a number of hotels nearby (on Exit 68), but the Best Western is literally right next door (they share a parking lot) so that's where we stay. Then it's up early and off for a fantastic day at 'The World'!