I plan to run season 7 Year of the Serpent for PFS starting with 7-01. As far as which one on which week, it will be up to the group and how quickly or slowly they make it through each scenario. As to 2-4 hours, I understand that sometimes stuff happens and plans go awry in-game and out. Sometimes adventures miss everything on their way to the main goal, that's okay too as its about the players and their fun.
Thanks for the offer of cross-posting. However, Nick at Heroes and Horrors Games where I DM/GM has a meetup account and is able to post events for me.