Flood damage to the trail deters crowds to what is visually a beautiful landscape hidden under the shadow of Mount Rainier.
Getting started was probably the most tedious part of the trip. With several ranger stations on the way to the trail, it is very confusing about where to stop to get the required permissions. To set things straight: get a $15 overnight parking pass at the drive-thru ranger station entrance to the park. As soon as you get this, drive and park on the right just past the backpacker registration building. Go in there and get registered if you are planning to camp up at the Glacier Basin campsite (car-accessible campground users do not pay here). We had to wait 15 minutes for this because the ranger was temporarily absent.
After finally getting through the hurdles of registration, we started off on a snow-free and mostly mud-free portion of the flood damaged trail. It was fairly easy to navigate through this part of the trail: follow the yellow tape that marks the temporary trail, which is now quite well-defined by the steps of several years worth of hikers. There were a few stream-crossings, but some strategically-placed stones help avoid getting wet. At around a mile in, a beautiful waterfall on the right of the trail will help cool down overheating hikers.
Once on the main trail, things start to get easier. After a bit of a dense forest section, meadows increase in frequency, some of which were in full bloom. Unfortunately, bugs also began to start their onslaught at this time. Repellent did not seem to help: cover up as much exposed skin as possible!
The campsite itself was very dry and perhaps 40% full. The only company we had was a large group of summit-climbers. There were no encounters with large wildlife, though we did see numerous frogs in nearby ponds and streams, and there were a couple brief glimpses of marmots.
Though the large meadow near the campsite had few blooming flowers, the mountain scenery was enough to compensate. The place was simply gorgeous.
The main complaints were bugs (as mentioned) and water accessibility. The nearby river of the campsite was difficult to reach, and the water was quite silty. If you plan on resupplying water, bring a purifier, since boiling the water does not really get the silty taste out. Also, it may be a good idea to resupply most of the water on some of the streams before the campsite, which are less siltier and much easier to access. If you are going to need more water while camped, try the right-hand trail off to the left of the main meadow - it is slightly muddier, but there is no climbing involved.