Give "The Elephants Perch" or "Sawtooth Mountain Guides" a call. It looks like the guides are already guiding Super Slab per their instagram https://www.instagram.com/sawtoothguides/?hl=en I climbed at the Perch last year the weekend of June 23rd. The creek was raging and difficult to cross and there was some snow on the way to the Perch, but it was doable. They've had substantially more snow this year so who knows. It probably depends on where you're wanting to climb.