Go and have a blast and send a nice gift. If they are telling people that their date is only two months away then they may find a lot of people can't make it! It probably won't be a surprise to them that you can't do it.QUOTE]
Do go and have a good time, though it isn't unusual for invitations to be sent at about two months before a wedding. Based on my oldest DD's meticulous following of proper wedding etiquette last summer, the invitations generally go out 6 to 8 weeks before the wedding. However, a Save The Date notice is supposed to go out about a year before the wedding date.
Who knows why they didn't notify you earlier. Perhaps they felt that they didn't know you very well but didn't want to hurt your feelings by excluding you altogether. I'm sure they'll be quite happy with a card and a gift. And they'll probably be pleased that they didn't make you change your vacation plans. You could always send them a set of Mickey & Minnie groom and bride figurines from WDW.
Dick Taylor