I'm fortunate in that I was able to store everything I didn't want to part with in mom's basement, and that no one will go through it or take it. We can bring things back with each trip, after shipping some at insane costs, just to get it here. Plus, we know we will eventually go back 'someday', so there will be some things we just won't bring over and they will be there for us.
We only shipped eight boxes over, but as much as they cost, we will just pay for an extra suitcase or two to get them back over when we do decide to move. That might be in five years or it might be twenty.