In addition to the stated desireable climbing season of July-October, Dragontail is also one of the more reasonable large backcountry peaks to be climbed in the early season. Early season starts whenever the Mountaineer Creek Road opens to the Stuart Lake Trailhead, usually mid-April (call Leavanworth Ranger Station). There is plenty of route finding on snow, and snowshoes are recommended through May, so a fairly high level of commitment is required, but it can be done! as long as the avy danger is low and the snow is firm.
you might think about doing serpentine or backbone car-to-car (esp if solo) as the approach is short & easy (& sitting around camp is boring....esp if solo) unless you're combining with other routes too. enjoy!
Bob, nothing too spectacular but can't complain too much either...nice run of weather we've been having eh? Hope you got a chance to enjoy it already. Take care & hopefully we can have one of those always-fun Portland area SP beer fests in the fall :)