Rob gives great advise on VB doesn't he? I'm going to save his paragraph on things to do around the area. Our first and only family trip was 5 nights in 2 connecting OVIRs and we didn't leave the resort except for supplies and 1 dinner.
That trip was 3 nights WDW/ 5 VB. I thought that 5 nights was OK but 6 would have been better ....but if we did 6, I might think 7 might be better
I highly recommend the OVIRs over the studios. First off you have a view of the ocean, and that alone is worth it. The Inn rooms also have 2 queen beds which would be much better for 4 people. Just remember that an OVIR can face the south(pool) and north as well as the east (ocean). They all will have an ocean view, just not as direct. Being in the Inn makes it easy to access the common rooms and dining if the weather is rainy.
I put together a little map on google with restaurant in blue and shopping in green if you are curious about the locations of things.
VB Google Map