Honestly, it starts to feel like a second job. I'm on a first-name basis with the guys at the counter now, and they just point to the back when I walk in. My trunk is basically a permanent oil storage unit at this point.
Yeah, you gotta get a drain pan with a lid and a spout. Lets you store a few changes worth before you have to make a trip. Saves a ton of time, and @terry835, it'll free up your trunk from being a storage locker. I just drop mine off at the parts store every few months now.