In 1984, I met a group of the Mennonites who built that lookout when they were on CO duty during World War II. They had taken a day-hike to check out their landmark, and made it back in time to take my evening cruise on the DeSmet at Lake McDonald. These guys were all in their 60s+, and they all chose to stand on the bow of the DeSmet during a north-wind boat-rocker while everyone else cowered in the cabin.
All those groups are tough as nails. Where I hike most of the year, we have a group of them. They are fearless and tough. I was doing a class 3 climb with significant exposure, and a group of women in long skirts came "flying" past me. They stood at the top of the climb and talked to me like a 5-year-old. "You can make it" - "you're doing great" - "you're almost there". When I got to the top they congratulated me, and they were off again. As a guy it was a little embarrassing.
In regards to the hike. I was afraid that there would be swampy sections with thickets. Looking north where there is a basin. This is a section I feared would be very difficult. From reports, it is horrible. I choose the creek bed south of there because it was steep enough to keep the difficult thickets and blowdown to a minimum. Hopefully, the stream will be dry enough that I can hike up it without difficulties. Or, to the sides where storm water runs. In the section that looks brushy, I presume that there will be some blowdown, slash, and saplings. It is only 2,000', but it might be a difficult 2,000'. I believe that this might be the most difficult part. Once I make it to the rock ridge, then it should get a whole lot better for hiking. Planning by satellite/topo can be difficult. What looks little and insignificant, can be quite significant when you get there.
The only other concern would be the griz population in there.