We made the 80+ mile trip from Rainy Pass down the PCT and out the White Chuck Trailhead between 8/16 and 8/23. Here are some of the issues that we ran into that we hope will help you on your trek. First, at the Rainy Pass trail head there is a sign that notes you need a special permit, only available from the local ranger stations to stay in the North Cascade National park and the Chelan Recreational area. We could not delay our trip a day to get one, so we went anyway. It would have been nice if they would have had a box at the trailhead to take care of this. Second, Both the Fireweed and North Fork camps were closed due to bear activity. You are very likely to see or hear at least a couple of bear on or near the trail in this area, we did and many others we talked to did also. Third, both the Suiattle and Milk Creek streams have very heavy silt and could foul your filter quickly. Take care or you water needs before staying on these streams. Fourth, The distance from East Milk Creek south to Milk Creek is shown on some maps as 3.3 miles and on some as 6 miles. There is now doubt that it is closer to 6 miles. This section is also completely dry. Not even a puddle or a drip. Fifth, there was a trail maintaince crew staying down in Milk Creek and are doing a great job up both set of switch backs. Thank you! The only stretch that we hope would be on a future plan would be from Mica lake to Glacier creek. There are some areas that are narrow, rocky of brushy. Not all of it, just some stretches. Last, note that the camps between Bridge Creek and High Bridge camp have bear cables, food lockers and garbage cans. There is also a bus that will take you between the two at times scheduled at the camps. You could also arrange a layover day via the bus at the local lodge down on Lake Chelan.
I hope this helps and remember to take plenty of film.