I think you did well to suggest to do separate presents. If you are not both there when the kids open them what would be the point? You would just rob yourself of the opportunity to share those magic moments with them... And after everything you've been doing for the kids you more than deserve to have those moments with them. Whether it's on Christmas day or another day is not so important.
I don't find your dream weird either. Just be careful not to "rely" on such messages too much. I'm applying this advice to myself too. Job once told me "for now, live your life as if he's not coming back". Not always easy to do but... the best advice ever!
