You should ruck more, so here's a thread for rucking. If you ever plan on hauling your rifle and gear out innawoods you should be physically ready for it.

Get a good fitted pack, hydration, and get outside at least once this week to put down some miles. If you don't ruck a lot, you don't have to start out with military grade gigaweight- load up with 10-20 pounds dryweight, and throw a camelback or a few canteens on a belt. If its hot and sunny outside don't skimp on suncreen, boonie hat, and/or sunglasses so that you don't cut your ruck short. Post this week's miles and weights.