Wife has to make a rare (first) overnight business trip. She has a conference in the DC area, and her team members are going to want to get dinner together that evening.
She could suggest they go to a kosher restaurant, but they're all 30+ minutes from the conference site and it's not realistic to expect everyone to schlep there.
She doesn't even care what she eats and doesn't need a packaged kosher meal per se and can just pick up something kosher at a normal grocery store (cheese, hummus, bread, that sort of thing...). Should she go with the colleagues to a treyf restaurant and bring in whatever she wants to bring in? (Not sure if that's allowed bc of marit ayin... or whether treyf restaurants even care about bringing in outside food... or whether its awkward for her colleagues...) Should she just eat by herself before and go and not eat?
She's never traveled for biz before so I'd appreciate any advice from people who have experience with this sort of thing.