Ok, first GC - I thought so! No doubt, that explains a lot of DW's almost exclusive focus on her. I'm not saying this is only true of women/GMs or always true of us. But I've heard of it more w/ GMs than GFs. If you lived near your DD and family, this may have calmed down a little by now. But since you don't, my guess is that DW is still running on "excited new GM" cylinders.
Sorry that your speech didn't get the results you wanted. And ugh! How awful to arrive to nobody home. I've heard of that happening to people w/ their AC and CIL before. though, so it's not just your family, if that's any comfort. And it's possible that DD and SIL are just very disorganized and do this to everyone, not that it makes it that much better.
Suggestion: In the future, maybe call or text them before you actually arrive and find out if they're home? You shouldn't have to, but... sigh...
This ^ will be more effective, I suppose, once you move there. Cuz then you can check before you leave your house and postpone leaving, if you want, until they're actually there.
About trying to kibosh their plans - I wasn't accusing you of that, if this is how it sounded (sorry). Just wanted to make sure that's not the problem cuz there are some GPs who try to have a say in their AC's/CIL's guest list/agenda. As long as you just want to know what's going on (don't blame you!) and a chance to opt out, that's cool, IMO. I hope you ask for that, in the future, and that they oblige. Again, this may be easier when you live there and can check before you go over, as to whether anyone unexpected is joining you.
I'm not really sure, however, what difference it makes to you if DD and SIL have additional guests, last minute or not, or if additional people are meeting you at a restaurant, as long as you and DW don't have to pay for their food, etc. Unless it's just that the addition of even a couple of people makes you all the more uncomfortable. Or if you would like some dinners out to be just w/ the family, period.
Once again, living there may help solve this problem. Then you and DW can issue some of the invitations and be in control of the guest list. So whether you have them to your home or take them out to dinner or whatever, you'll be able to ensure that there are no extra guests (I think).
Glad that DW chose to spend the weekend w/ you instead of w/ DD and family skiing! It shows you she's already starting to wind down. After you move (sorry if it seems like I'm harping on that), no doubt, she'll still be very open to spending time w/ DD and family and watching GD for them. But just as likely, she'll want some time for herself, as well, and for the two of you as a couple. You and she may want to discuss your hopes/wishes/expectations for how things will be then, however. And before the move, you both may want to find out what DD and SIL are envisioning and come to some compromises, if need be, etc.
Meanwhile as Ana points out, this long sojourn is almost over. You go home tomorrow, in fact! Exhale!
And this long post (sorry) is now over, too. Hope you keep in touch w/ us!