well 1 thing to consider is the YCW crowd will be teenagers!
Your kids will be more interested in HDH.. oops sorry Half dollar holler, and the grand exposition and maybe grand exposition. Therefore the crowds as such wont bother the kids and their playing at all on sunday!.
As far as you and the wife are concerned you will be able to ride a lot easier if you wait to ride thurs/friday.
Dont let sunday scare you off!
where are you staying? motel? we (sdcfans) have a great connection at wwweagleslodgebranson.com
If your doing any shows/attractions in branson try this for compettitve pricing
wwwallaccessbranson.com
Have a great trip, and dont forget to let us know how it went!