I always used to have backpacks and stuff, then I picked up a hard-sided plastic suitcase – Delsey or Samsonite or something. Changed my life!!! They’re great. They actually protect the stuff that’s inside so you can put vaguely fragile stuff inside, you can lock them up, you can strap them tight and you don’t have to carry the weight.
Get one with four castors. Very important. Means you can push or pull. When I was choosing it in the basement of the dept store, I was wondering whether to get two wheel or pay extra for four wheels. A woman came over and said “you have to get the four wheeled one, they’re much better”. She was right – my plans changed and I had to carry this suitcase across town three times that same day. Without the wheels it would have been a nightmare.