Punchline: if you are an average hiker/first-timer, skip 2017.
How likely is it that Trail Camp and switchbacks will be snowed/iced in August?
Very unlikely, I would think. Probably will still be patches of snow on the trail in early August though (especially by the cables and near the summit). But nothing that a first-timer has good cause to cancel a trip over.
August and September should be good for hiking Mt. Whitney. September will be better this year because streams will be lower and any remaining snow patches covering the trail from the previous season's storms will be gone.
