By all means, multi task your activities. If you are going on a hike, you can bring some trash bags for a trash treasure hunt, discuss the principles of Leave No Trace and practice them during the outing, find a geocache along the way, identify plants or wildlife along the way to work on an achievement, etc. Your participants end up with a hiking segment, a partial toward the LNT award, an appropriate amount of time attributed to a service project, a rank achievement, etc. As Bulldog indicated, your service can count toward a centennial award, Good Turn for America, a rank achievement, and