This non-profit organization, whose main work is preserving and protecting Montana's rich dinosaur history, offers six-day dinosaur digs in Eastern Montana each summer. The digs are demanding, both physically and mentally. The work is often hot, dry and dusty. The activities are centered on rocks and bones. In short, JRDI fossil hunts aren't for the casual vacationer but rather those with an interest in paleontology, geology and natural history. Family Travel Tips: The minimum age is 14.