DNR’s rustic ‘lodge and learn’ center is like summer camp for all ages Updated 1:31 PM; Today 1:31 PM The Ralph A. MacMullan Conference Center in Roscommon, Mich. offers a variety of outdoor recreation opportunities, including hiking, canoeing, swimming and fishing. Photo by Michigan Department of Natural Resources, used with permissionMI Dept. of Natural Resources Facebook Share ROSCOMMON, MICH. -- The Michigan Department of Natural Resource’s rustic lodge and conference center in Roscommon has reopened to families, individuals and small groups looking for a unique escape. The DNR’s Ralph A. MacMullan Conference Center — known as the RAM Center — captures “the fun of summer camp” while also offering lodging, outdoor recreation and education opportunities, and conference center facilities.