on my list is Wonderland trail. What are some other incredible backpacking trips that everyone should do?
Seven Lakes Basin in Olympic NP and the Enchantments in the Eastern Cascades were both amazing!
Alpine Lakes! Need permits, but totally worth it.
I am doing Wonderland later this year, and I am extremely excited for it. Other than that, I would highly recommend Upper Lena Lake as a great one night backpacking trip. I have done it as a day trip before, but is much more reasonable to do as a backpacking trip. To make it longer, you could spend a night at Lower Lena Lake as well. Beautiful, and great swimming areas!
Stehekin Washington. Take the Lady of the Lake up from Chelan to Stehekin, then hike up along the Stehekin River. I took my boys backpacking up there ~20 years ago and it was a great experience being so far away from modern civilization (no lights, no human made noise, just pure nature).