I'm presuming that since Sinleth (my character's blue) was hatched at Igen, and we're all playing at Fort, that this is somewhat after the Oldtimers came forward four hundred Turns, so dragons would be living at Holds and Halls, at least temporarily, as they came on and went off rotations as watch dragons.<br/><br/>Still, the Mastery question daylily raised has some very good points to it... Most Crafts take decades to gain Master's knots, and when they hit early 20s, people become too old to Impress dragons.  I think that the eldest one I've seen in canon was Breda Impressing Amaranth at 22 (in<em>All the Weyrs of Pern</em>).