Based on prior years experience (and knowing that the glacier has slid)
1 rope to rap No crampons or ice axe needed No water on route Crossover is a PITA. Lots of steep dirt. Water in all likelihood once you get off the wooded stump (off ridgeline and into basin) Consider a second car or bike and descend the Slesse Creek Trail.
The cross over is not that bad. I think it took us 3 1/2 hours to go from the summit to the car. The route finding on the first half is a little tricky. Definitely bring pictures of the route with you. The second half is a ton of loose dirt and some steep forest, but the route finding is easier. I think there is a really good description of the descent route on Cascade Climbers.