PREP UPON ARRIVAL ON BEACH!!!!
1. Season salmon fillets with lemon pepper, garlic powder, and salt.
2. In a small bowl, stir together soy sauce, brown sugar, water, and vegetable oil until sugar is dissolved. Place fish in a large resealable plastic bag with the soy sauce mixture, seal, and turn to coat. Put in Cooler for ideally two Hours or as near it as possible.
3. Preheat grill for medium heat.
4. Lightly oil grill grate. Place salmon on the preheated grill, and discard marinade. Cook salmon for 6 to 8 minutes per side, or until the fish flakes easily with a fork.