We are VB owners and were there for the eight days just before the Easter Weekend this year, 2002. We left on Wednesday, two days before Good Friday.
While VB was reported as full, I did not think it was overcrowded. The pool was busy, and you had to look to find two pool chairs together that did not have towels on them, but we were always able to find space. The longest line for the pool slide that I saw was eight kids, and that was because one adult was stopped at the top showing a kid the view. The campfire had a lot of people, but not to the point where anyone couldn't get into the campfire area or hear the cast members.
We didn't have any significant problem of delays for any meals at Shutters or the more formal restaurant (I forget the name). No waits in the morning for breakfast, less than 10 minutes at lunch or dinner. The only time we saw a wait problem was for the porch at the bar during the afternoon, as people would be seated inside waiting to move to the tables outside, and others would come up from the outside stairs and sit at an empty table before it was cleared.
The staff told me the overcrowding problems would be with the restaurant on Good Friday and Easter Sunday, as it is open to the public and many local town residents / vistors call for reservations and eat at VB. They planned to open one or more of the adjacent convention rooms and set it up to serve a meal. Longer term, VB may have to look at a way to give
DVC members staying on site some type of preference for reservations for holiday meals.
There were more people in the elevators and Inn hallways, and more children playing in the hallways when the evenings were cool. It didn't really annoy us in terms of noise, although I wouldn't have let my kids play kickball unsupervised in the hallway.
With the closing of the DVC sales desks at VB and the change in room use mix to more DVC members on points as more of the units are sold inventory, I got the impression that the convention rooms and the large lobby spaces were very underutilized. I think this is for two reasons: 1) they don't have overnight rooms to offer to the convention crowd and 2) they sized the lobby and meeting rooms for a full resort, and then decided to cancel the building plans for the across the road units.
One thing we did learn - the smoke from people at the tables on the open porch at the bar is very obvious on the balcony of the thrid floor rooms immediately adjacent to the bar porch. We had to leave our balcony and close the door on two days, even though our room was a designated non-smoking room. Otherwise no problems.
Hope this helps answer some of your questions.
Cap
) No people, just towels. So I made it a rpactice to go out around 8 and SIT in my chairs to hold them til the DF got there. Shutters was busy, and you will want PS's if you plan to go during typical meal times. Other than that, I didn't notice significant issues. 
bump into each other 
