One bedrooms tend to be the last rooms to fill at the WDW resorts except for VGF, where dedicated 2BRs and GVs last the longest, BLT standard and Theme Park view where 1BRs occassionally fill before studios, and AKV club level and value where they often do last longer than studios and 2BRs but for those that can sometimes mean a difference of only hours.
Otherwise for 1BRs here is the current annual patterns at 7 months out at WDW, which takes into consideration that you will be looking for 6 or 7 nights in a row. From the Monday after Marathon weekend in January until late Sep,
DVC's low to moderate demand season at WDW, you will usually find the following 1BRs open at 7 months out and usually for some time beyond the 7 month window: SSR, OKW, BCV, BWV (incuding standard and boardwalk view), VGF, BLT lake view and usually theme park view, and AKV standard and savanna view. During that time, you can sometimes get lucky and also find an AKV value 1BR or BLT standard 1BR, although if that occurs it will more likely be during DVC's lowest demand times of the year -- Feb 1 to the Thursday before Presidents' Day weekend in mid-February, Feb after the Princess half-marathon weekend to about mid-March, last week of April, and July 10 to end of July.
DVC's high to extremely high demand season at WDW runs from late September to marathon weekend in Jan. For 1BRs, SSR, OKW and AKV stand and savanna view will usually be open. AKV club level, value and BLT standard are usually out of the question (particularly for any 6 or 7 night stay). BCV, BWV standard and boardwalk view, and VGF 1BRs are also low probability but sometimes you can get lucky. BWV pool/garden is hit or miss much of time with higher chance of hitting early Oct, Mid-Nov after Food & Wine ends and before Thanksgiving week begins, third week of December, and Jan 3 until the Thursday of marathon weekend. VWL is also hit or miss much of the time but its 1BRs tend to be open even more than BWV pool garden 1BRs.
