I agree on taking raw nuts. Usually I bring a bag or two of raw macadamia nuts. And as for fitness you have your walking so that will be covered. But for strength training I would go with burpees. They work out a lot of major muscle groups and can be easily done in your hotel room and doesn't take any equipment or bars. These could be done when your significant others are getting ready.
"If man made it, don't eat it" - Jack Lallane
People say I am on a "crazy" diet. What is so crazy about eating veggies, fruits, seafood and organ meats? Just because I don't eat whole wheat and processed food doesn't make my diet "crazy". Maybe everyone else with a SAD are the "crazy" ones for putting that junk in their system.