I hiked the Hoh river trail last year with my backpacking group. We walked all of the way up to Blue Glacier. Met some climbers coming down from the peak on the way up to the glacier. It is without a question a technical climb. I would suggest getting some mountaineering experience under your belt before attempting Olympus.
Pictures of the trip below. Pictures of Mt. Olympus look like an easy climb. But really when you are close and in person it is without a question technical.
Olympic Guard Station camp first night 9.5 miles in
Hi Ho Bridge from 2nd day of hike in
Goat at Blue Glacier overlook
Mt. Olympus closeup
Mt Olympus
Mt Olympus and Blue Glacier and summit approach from via blue glacier on the left
Approach to sumit close up to put it in perspective
My group is doing hoh river trail again this year on Labor Day Weekend. If you are interested we would love to have you along.
Link to info from last years hike up Hoh River to Mt. Olympus Cameron