Well again, it depends on what's available at the destination. I trust my speakers, and unfortunately, they're not powered. So if there's no suitable monitor amp to use, I must bring mine.
Of course, I've done simpler projects with my 003 and laptop and headphones, so whatever works, I guess.
As far as mics, it totally depends upon the project, but I've got a road case that fits almost all my mics, so if I'm going to bring one, I may as well bring several.