What do you do when you run into steps?2 words... utility cart. I never take my kit anywhere without bringing my utility cart. I load all the cases onto the cart and wheel it in to where it needs to go. Takes 3 loads (including my road case) to get everything from A to B and it's easy on the back.
I use the folding Rubbermaid one that's about $100 at any Home Depot. Real good investment.