GAC, I would say most of the work involves getting ready for your draft. In head to head leauges, you only have to worry about setting your roster once a week, so at the bare min you would have to check in just once a week (but that's no fun right) to update your roster based on injuries, performance, etc. Above and beyond that is up to the owner, but to remain active that would be all that's needed.
"You're drunk again. No, I'm just exhausted 'cause I've been up all night drinking."