I go with a variation on the slaw that avoids mayo or anything else that needs refrigeration.
Google Ramen Noodle Broccoli Slaw
Basics of it are:
2 bags of ramen noodles smashed up
2 bags of broccoli slaw
Butter
Cider Vinegar
Oil
Brown Sugar
Seasonings to taste
slivered almonds
pine nuts
Make a marinade of oil, cider vinegar, brown sugar and seasoning. Whisk together. Set aside or pour in to a separate container for transport.
Rinse and drain broccoli slaw. Put in salad bowl.
Melt half stick of butter in a skillet. Throw in ramen noodles, almonds and pine nuts. Stir until brown. let cool.
When you get ready, mix broccoli slaw with noodle/nut mixture. When done mixing pour marinade on top.
Voila. Goes well with most BBQ foods.