Whether you have any 11 month issue depends on which resort you own. It is unlikely to be an issue except for some risk otherwise at AKV (if seeking club level or value studios or 2BRs), BWV (seeking standard view studios or 2BRs), OKW (seeking a GV in the near Hospitality House booking category), or CCV (seeking a studio or 2BR lock-off). Though walking might succeed, you could have issues even finding a time to start walking particularly for AKV club level or value studios.
At 7 months out, many things can be open but a number of things can be gone. Likely you will not be able to get BWV GVs or boardwalk view studios and 2BRs, BLT GVs or standard or TP view rooms, anything other than cabins or GVs at CCV, BRV studios, BCV other than 1BRs, AKV Jambo GVs, studios and 2BRs, VGF studios, OKW GVs, and also OKW studios in the near Hospitality House booking category. There is also some risk that AKV Kidani standard studios, BWV pool/garden view studios and BLT lake view studios might fill before 7 months out. As to walking at 7 months out, you have the issue that even if you can find an opening to begin walking, days you are trying to walk into can easily be booked by owners of the particular resort just before 7 months out. However, I have seen in past years that some rooms may actually show July 3 and 4 open as late as seven months out from June 28 but thereafter fill, i.e., if you actually started a walk by reserving a start date of June 28, you might walk into them for July 3 and 4 time because the rooms are open for June 28 to July 5 at 7 months out from June 28. Rooms where that has occurred include BLT lake view studios and GVs, BWV pool/garden view studios, BRV studios, and AKV Jambo studios.