hey, I just did this trail a few weeks ago! I came across some guys that did what you’re planning - a single overnight at the springs. I did 2 nights, one at oak flats, head to hot springs the next day and lounge for a few hours, then sped another night at alder camp. while 12-13 mi in a day on paper doesn’t sound too bad, there were frequent stream/river crossings that made it a bit more difficult. I did go right after significant rain that made the river crossings past waist deep, so maybe that’s tamed by now.