I first went on this hike when I was in my early teens. Been back several times since. It’s a really great area with a reasonable hike-in. The lake is ice cold, which is nice if you’re just finished a hot hike in. There are some areas sort of cleared for camping, that have clearly been used before. You can hike on from Dorothy to another lake further up the trail (Bear Lake if memory serves me). There’s a a rustic open toilet in the bushes, but there’s no privacy. Not news for experienced backpackers, but a shocker if you’re new to it.
Easy stair stopped trail; a bit harder with a 40# pack. Lots of camp sites to choose from, but the one on the far shore of the lake is my fav. Great for groups. Primitive toilets along the way. Bring bug repellant. The flies are abysmal.