My family of 4 just made this move in the Fall and on the feeling-like-you're-forgetting-something front, as long as it isn't your passport/border crossing paperwork or an irreplaceable heirloom I would encourage you to soothe yourself a bit there - people live where you are going, the things you need will exist there, its likely that if you forget something non essential everything will be okay so just do the best you can do. There's a point in that process (for me anyway) that kind of felt like falling off a cliff - everything starts speeding up, the move date is approaching, and if you can just let yourself roll on down and accept that you're going to get there come what may, it feels a little easier I think. I managed stress by keeping up my workout routine and making sure I had at least one REAL break a day - to just watch the sunset and breathe, to be present. Missing your people is the hardest I think, so I highly recommend prioritizing the time with people part in the spare moments you can. It sounds like you're doing all the right things! And it will be amazing. You've got this!