If you are buying any points other than grand Californian good luck trying to get rooms there at the 7 month window. I was checking for about a month for a 1 bedroom but you could see all the reservations being walked.
No to cruises and you are not eligible for member cruises, but if you wanted to do a disney cruise (or any cruise) you could rent out your points and use the cash to help pay for it.
As for VGC - you can use points there but don't bank on it -- rooms go very quickly and often what is left at the 7 month mark are only 1 and/or 2 BR.
...unless, of course, you buy VGC resale and book VGC at 11 months, which is typically pretty doable. Still cannot be used for DLH or Paradise Pier or cruises.
A 3-night Bahamian cruise in Value season in an inside stateroom starts at 93 points/person, and it's double occupancy. So 186 points to start for a 3-nighter. A 2-night Baja starts at 86 points/person.