Nelson started Scouting in Goodman’s old Troop 1 in Philadelphia. He was inducted into the Unami Lodge at Treasure Island in 1919. Nelson was in attendance at the 1921 First Meeting of the Grand Lodge. He served on the camp staff at Treasure Island Scout Reservation and served as the 1925 Lodge Chief of Unami Lodge. On September 17, 1925 H. Lloyd Nelson kept the 45th Vigil in the Order at Treasure Island during the Fifth Grand Lodge Meeting.