Only have a slow street/strip car that I run brackets with, no trailer, load up the tools in the trunk and head to the track.

I used to race sportbikes, and would have everything loaded onto a tiny open trailer and the back of my Jeep. It was important to streamline the simple stuff (loading/unloading, finding tools, etc) so I could spend more energy on tire/shock tuning and getting my head in the game. As someone else mentioned, a routine that is second nature helps immensely.