Have a seat on the porch of this old cabin and rest your weary feet. You've just accomplished the most arduous part of your day. Just a few feet above the cabin is a modern vault toilet (not the one in the picture!), plus a spring-fed faucet that operates most of the time. (filtering or sanitizing is recommended).
After you're rested, head uphill to the trail junction and follow the signs to "Willson Peak", which is still several hundred vertical feet above you.