I've failed on my summit attempts on two tries this year, and I too am going back. The first trip had me T-stormed off of the mountain with a soaking wet sleeping bag, and left me so frustrated and bummed that I went back the next weekend. Left on Thursday mid-day, picked up an available day pass for Friday, slept at the hostel, and left at 1am-ish. The lack of acclimatization left me hurting bad at just below 13k.
We're going back mid-September for a day hike, and I got lucky and drew the night before the full moon. I'll be leaving at midnight for no purpose other than enjoying the night. We're staying for two full days before the hike to acclimatize, and I've got an appointment with my Dr. for a prescription for Diamox, hopefully. Pulling out all the stops on this one, hoping everything goes my way.
It's frustrating to not summit, but there's always next season. Don't go beyond your limits.