Sonny: I think you're right about there being a JR day being next week. Although it doesnt seem like it is the only one. Kill has already had a junior day or 2 for a few recruits and seems like from what I've read to be in favor of multiple Junior Days. Maybe this is how most programs do it, IDK.
The benefits off the top of my head are: Flexibility so the recruits can get make here. And smaller numbers so the coaches get more 1 on 1 time with the recruits. I know Andre McDonald commented on how he liked the smaller Jr Day he attended here versus the larger one at Iowa for that very reason.