Hi,
Yes, if their is any availablity. The campsites are the cheapest way to stay at Disney, so even at regualr rate they book up fast! When they do offer the discounts for the sites, the number of discounted sites are limited. They won't know if their will be a Florida Res. discount til late spring. So, book now and try to add a discount later.
PS
I am already booked for a full-hook up for the end of May through the 1st week of June. So, maybe I'll see your there...
Mmketeer