Since you are an owner - here's what you should know about booking. (You didn't mention where you own, so I will generalize.)
Generally at the 11-month mark you can get into most room categories at your home resort (wherever you own) at any time of year. The exception to this are the "low point" category rooms (Value rooms at AKV, standard rooms at BLT and BWV) and also VGF studios, which all book very quickly. Pretty much everything else you can get to at 11-months or slightly less. Some resorts will fill up faster than others, but if you book close to 11 months at your home resort, you are quite likely to get in.
At the 7-month mark is when you can book across all
DVC properties. At the "very busy" times of year, a lot of these properties will already be filled. (Oct-Dec being the main one, holidays, and also during any marathon weekends, such as the last weekend in February when the princess marathon occurs.) The rest of the year, you can generally book at quite a few resorts at the 7-month mark. Some resorts are super popular with non-owners, such as Beach Club, and as such when there IS availability at 7-months, it goes very quickly. However, there is generally always SOMETHING available at 7-months, even if it's OKW,, SSR or AKV (the easiest to get into resorts). The closer you get to your dates after 7-months, the less availability. Early December and then October/November are the worst for being gone close to 7-months. Some times of year (early/mid September, late January) are actually usually pretty available even down to 3-4 months.
Hope that helps!