The walk up line at VN the last time we were there probably had about 20-30 people already waiting and another 10 or so waiting to put their names on the list.
I would do one at H&V if those characters are important for your kids. We get one, even though we don't have kids, because I feel that the breakfast choices in DHS are very slim (about as bad as MK if you don't have an ADR at CRT or CP).