Just a comment that things like this probably should not be a huge consideration in picking a home resort. How many years will your children be using the kids club...1j0? And most contracts have 31-50 years left on them. So most of your ownership years will be when your children are older, or even grown up!
This. Don't pick a resort for today. And don't buy
DVC for 30 years from now thinking "we will take the grandkids." Think ten years out. Today is too short sighted and thirty years - well, a lot changes. Over the next ten years, how much are you going to use the kids club? How much will you be in the MK? How much will you be in Epcot? How much will you be using the pool? What fits for you in terms of theming? Do you have a sentimental attachment to anything? What fits into your budget?
Also, think carefully about heavily weighing issues like "availability of GVs" if the reason there is "we will bring the family." Bringing family turns out to be a more complicated thing than the enthusiasm of a considered DVC purchase takes into account. And sometimes, with family, multiple rooms are really better anyway - its the only thing that kept my brother in law from being at the bottom of Bay Lake with an anchor attached to him. (Dear man that he is, seven days in the same room with him would make me or my husband homicidal).
Also remember that things do change. The ink wasn't dry on some of those SSR contracts bought for DTD fireworks and the Adventurer's Club before Disney stopped doing fireworks and closed the AC. A kids club that is there today might be a counter service restaurant in two years. When we were looking we passed on OKW because it didn't have a slide in its pool (well, the situation was more complicated than that) - two years later, it had a slide.
Also, don't get TOO hung up on "buy where you want to stay." IF you are flexible and don't have your heart set on something, the vast majority of situations are available seven months out for most of the year. (Those GVs are an issue - specialty rooms in general are an issue - GVs, specialized views, treehouse villas). I really prefer "buy where you won't mind staying." i.e. book home at eleven months - see what else is out there at seven.
The last thing - with the exception of SAB and room types (Standard View, Boardwalk View and Grand Villas), BWV and BCV are close enough that the amenities are pretty easily used by guests at either resort. Want to see the BW entertainment while staying at the BC, not a problem. Want to go eat at B&C - its a longer walk, but the walk isn't THAT long for Disney. I think Kidani and Jambo are similar (but I haven't stayed out there since Kidani was built).