When I have a longer haul from the car to the job, I use the Rock and Roller also. I use a custom made top rack, designed by Gary Diamond.
At my regular job it's only a few steps, so I just make a few trips. Actually the bus boys usually do it for me.
The heaviest piece I carry is 25 pounds, so no big deal.
I was running a little late Friday, and set up in SEVEN minutes, from car to playing!
DonM