At 7 months out for those that have a standard view booking category:
VGF: whether standard or lake view, studios can be difficult year round. However, your not-so-great chances are best February before Presidents' Day weekend begins, Feb after the Princess half marathon weekend till about mid-March, mid-July to mid-Aug. 1BRs, both standard and lake view, are usually open from the Monday after marathon weekend in January until end of Sep. and there is some chance at times in the last quarter of the year.
BLT: for standard view, any room size, it is very often a problem year round but chances for a studio or 1BR are somewhat better first week of Feb, late Feb to early March after Pirncess half marathon weekend, last half of July.
Poly: it has a huge number of studios with most being standard view. Still needs time to develop reliable pattern but it appears it will likely be available much of the year although there might be some risk otherwise during very high demand times during the Oct to Dec period.
BWV: standard view studios (and resulting 2BRs since all 2BRs are combo studio and 1BR) can be difficult any time but better chances can arise Feb before Presidents' Day weekend, Feb after Princess half marathon weekend to mid-March, last week of April, about mid-July to mid-Aug. Standard view 1BRs are usually available from mid-Jan to late Sep.
AKV: AKV standard is open much of the year, Jambo may be blocked at times, particularly during the last quarter of the yea, but except for some very high demand times in the last quarter of the year, standard view studios at Kidani are usually open. The same applies to standard view 1BRs but those have even less risk to disappear in the last quarter than the studios. AKV value is an entirely different story. It is usually gone at 7 months out with some chance to get lucky during the same times as BLT standard mentioned above.
SSR: SSR will not be beginning a standard view booking category until next year but likely it will be fairly to easy to get mid-Jan to late Sep at 7 months, and probably the last quarter although it might have issues at very high demand times.