Swap out your figgy bars and trail bars for ones with added protein like GoMacro, No Cow, ProBars, Orgain Organic Protein, Quest bars.
Or opt for an all natural bar like Rx Bars or Clif Whole Lotta bars that are higher in protein than their whole-food ingredient competitors.
Protein powder is lightweight, compact, and easily digestible. Bonus points if you get a protein powder that includes a multi-vitamin.
Try adding a scoop of protein powder to your oatmeal in the morning. Just be sure to add more water to avoid your last being so thick you could stand a spoon in it!