Thanks to everyone for all the kind wishes today!! (And for agreeing that I'm not too big of a baby

). DH did just point out something funny- since both MIL and I are obsessive planners and his sister is not, now MIL will probably back off from us and spend the whole trip telling them what to do!
He is starting to agree with me that we do not need to spend every waking moment together while on the trip- my MIL goes Commando and as much as I want to, DS2.5 (who will be 3.5 when we go) just can't do it.
As for our dates, we picked them to stay away from WDW during PopWarner since we are staying at POR and quite a few of them will be there. SIL wants to go that week because it will be her daughter's 2nd birthday. As far as I am concerned, they are free to go that week, we'll go the following and if the weekend matches up, fine, and if not, it's fine with me if we don't all go together...
Anyway, thanks again!!!!!!