I boxed in all the dollies and they have been exactly the right idea for my small garage. The pickup is pretty easy to move anywhere I need it.
Working on either side of the truck is a breeze since I can push it all the way over to one side of the garage or the other at will. Brakes on the casters will lock them in place so the truck wont move on me.
Shots of how I boxed in where the tire sits on the dollies.