" The Tatoosh range traverse. You can bag seven peaks in the Tatoosh range just south of Paradise in Rainier NP, in 12 hours- one very long day."
A word of caution on the Tatoosh at this point in time. I've been down on Rainier 4 times in the last 7 weeks, carrying water up to Camp Muir. The hike from Paradise up to Camp Muir offers a grand view of the Tatoosh to go with the blood, sweat, and tears. Be aware that there was above normal snowfall down there this year and the entire Tatoosh Range is still very much snowed in. You could probably find a protected spot to snow camp,
but there is no way you will get very far on the traverse. It's still way too much of a slog. You could, however, do an overnight snow camping trip if you have snowshoes. It is drop dead beautiful down there these days, but be prepared to work very hard. Also, be sure to check with the rangers on the latest avalanche conditions. 2 weeks ago, the entire north side of the range had extreme avalanche danger. It has been cool with occasional snow since then,so there is a chance some of the slopes will still be unstable.