Camping Steak Marinade

1.5 pounds boneless top sirloin steak, about 1.5 inches thick
1/4 cup + 1 Tbsp reduced-sodium soy sauce
3 Tbsp. steak sauce 2 tbsp. lime juice and packed brown sugar
1 Tbsp. grated gingerroot
2 cloves garlic, minced
1 Tsp. sesame oil
1/4 Tsp. black pepper

Trim any excess fat from meat. Pierce meat in several places with fork.  Place steak in Ziploc bag.  Combine all marinade ingredients in a small bowl and pour over steak in ziploc bag, and smoosh all around.  Toss into freezer until ready to take camping. 
To Grill:  Remove steak from marinade and grill over hot coals or gas grill for 4-5 minutes per side, or until desired doneness is reached.  Brush with leftover marinade while grilling.  When done, remove steak from heat and let 'rest' for a few minutes before slicing.