While the government acquired the land it needed, Mary subsequently gave the Boy Scouts over 100 additional acres suitable for a camp.

All four camps offer various activities and merit badge opportunities that vary based on age appropriateness, Scout Rank and weather.

Laurel Highlands, BSA, is headquartered in Pittsburgh, PA, and serves approximately 30,000 youth and their families from a twelve-county area in south western Pennsylvania.

Camp Seph Mack encompasses approximately 200 acres within the boundaries of Yellow Creek State Park and lies along the north shore with of almost 4,000 feet of lake frontage.

The William Penn Council, a predecessor to Laurel Highlands, first operated Seph Mack as a Boy Scout Camp in the late 1940s.

The camp ceased operation in the late 1960s and was sold to the Commonwealth of Pennsylvania as part of the development of Yellow Creek State Park.

An organization titled William Penn Inc. was created to administer the investments made with the proceeds of that sale.

Today, William Penn Inc. is a major contributor to Laurel Highlands Council, providing donations from its investment income as seed money for capital improvement projects.

In 1999 and 2000, with the support of William Penn Inc., a first-rate shower facility was constructed at Seph Mack for the use of the campers and guests of Laurel Highlands Council.

The waterfront and aquatic area was regraded and improved when the State drew down the water level of the Lake during the winter of 1999–2000.

Through a generous contribution of a Scouting supporter, Laurel Highlands was able to purchase a large pontoon boat, christened the Jolly Roger in honor of our benefactor, which can be used for teaching power boat safety or for taking groups of Scouts to new and different fishing spots around the Lake.

Seph Mack has programs in astronomy and space exploration, canoeing and small boat sailing, athletics, and handicrafts of all kinds.

In the past few years, Seph Mack has hosted Native American Festivals, SCUBA training programs, fishing and boating clubs, business meetings, military units and family reunions.