We use the Egg Beaters type boxed eggs for cooking in recipes, and real eggs for scrambled or fried eggs. You can carry them in a cooler or in a dry box. I wrap the carton of eggs in bubble wrap to prevent breakage, then put the carton in a zip lock. I don't pre-break the eggs & put them in another container.....time consuming & not necessary in my opinion.
For dry goods (brownie mix, pancake mix, etc.) Remove the product from it's outer packaging, save the cooking instructions, put in zip lock bags. This reduces excess packaging & trash on the river.
Pre-cook as much as possible & freeze (pasta sauces, ground beef, etc.). If you have access to a vacuum sealer use it, if not, the zip lock vacuum bags work great.
Good cooler & dry box organization really helps. Make a menu list for each meal, and organize stuff according to meals. This eliminates excess opening of coolers & pointless rummaging in dry boxes.
Hope this helps.....Have an awesome trip.