We stayed in one 2 years ago at BLT. We booked OKW our home resort then swapped to BLT at the 7 month window due to 3 of our grandkids being small and the resort next to the MK and monorail made since for us, it worked out great. Had enough points then don't this next trip. We have stayed in the two bedroom at OKW and it was very nice and roomy but there were only 6 on this trip. The 3 bedroom I am sure will be more than enough for the 10 of us. Vey similar to your family(us, our 2 kids and 4 grandkids). We took the Master, heck its our dine and let them fight over the other two bedrooms, there was no problems though. When we walked in one family went one way and the other went the other way to the rooms and that was that.
We also used Garden Grocer to have all of our groceries delivered and have used them before. One trip we had some broken eggs but that was the only issue. Disney will also deliver groceries but they are much more expensive. Have fun and enjoy...smjj