"Best" is pretty open-ended, but one of my best days had to be the day my fire crew headed home after our busy assignment in 2015. I'll save the details for my memoir, but we ended up working on four lightning fires throughout the forest. One of those fires was on my birthday. We ended up working most of it on a 37-hour shift.
We finally got back to town at night, after demobilizing and releasing our crew. My boss gave me a ride home since he lives nearby, with one stop at a local bottle shop. After grabbing my selection, he decided to pay for me and finally dropped me off. I arrived home at night and off-loaded my gear, greeted by my dad and our dog. I was tired as hell, but got to enjoy that beer out on the patio that night. It was a fitting way to end my assignment.