What are you using to search the SFX you bring to sessions on your drives? I have thought about Soundminer so that I may have metadata access as ProTools will only search file names and any comments written in ProTools. But I am concerned I will not be able to run the Soundminer application from the SFX drive and will need to install software on each system I go to. How are you doing it?
Soundminer has a built in function called "freelance mode" that let's you install the software and databases on the same portable drive as your library. So you can just bring the one drive, plug it in and you are ready to go. Go to the help window in Soundminer, pull up the manual and it is all explained in there. Good Luck.