I hope I can help
When you go into Last Call or Extra Vacations, there a couple of ways to search. On the left side of the screen it will show the areas of availability and under there, the dates of availability. If you interested in a particular area, go into the area (ie. Southeast). When that is chosen, then the States in that area will drop down (ie. North Carolina, South Carolina, etc.) If you're just interested in North Carolina, you can chose that (if you're interested in all Southeast areas, then don't choose a State). Then the availabilities (number) will show on the left for the various months (ie. May 2009 (8), June 2009 (6), July 2009 (2)). If you want a particular month, chose the month. Don't chose a month, if you're open to dates. The list of availabilities will show on the screen with the date ranges. If you see a resort you like that has the date range that you're looking for, click on the resort and the available units and dates will come up.
Extra Vacations shows availability for 12 months I believe. Last Call is usually 2-3 week period.
Hope this helps.