After my husband died, I decided to move cross country to live near my children who had moved to California.
My sister's husband told me it would be so easy to just pack my stuff into one of those storage units on wheels. (that are used by many people just to store their things in town.) They did it to move from one house to another in the same city in Ohio. I kinda looked at him bleary-eyed. Kept my mouth shut. Because I wanted to yell at him that I was all alone and was in my 70s and there was no way I could lift boxes and carry them into one of those things. Plus, I was moving from coast to coast. Just no way I could do that.
So I did the safe thing and hired a moving company. Had to ship my car, too. Had to leave several generations of stuff there on the east coast. Yes, for years I kept wishing I had packed this or that, but I was trying to save money on the move. Didn't even have a place to move to, so spent several weeks looking for a place.
Finally bought a small place a year later, which wouldn't have been able to hold all the stuff that I wanted to bring but didn't bring. But I do love my little one level condo.
Before my marriage, I lived in 12 states and have survived those moves. (my Dad avoided all the Red States.) So I knew a bit about packing for moving. But this last move cross country right after my husband died was horrendous. No wonder I didn't manage to pack and bring all the things I later wished I had brought.)