I already gave my opinion on what I think happened up to Monday morning, so I may as well attempt to come up with something somewhat feasible for that day too.
Some time after Mark left for Durango, Dylan woke up, ate breakfast and discovered that his phone was dead because he fell asleep Sunday night without putting it on the charger or turning it off. He plugs in the charger, starts charging the phone, and decides to walk down to the store at the intersection of 500 and 501 to grab something they forgot to get at Walmart (chocolate, drink, whatever) while waiting for it to charge.
Earlier, ****** drove to the area planning to call Dylan and have him meet him/her down the road a bit. S/he drives by the house and sees that Mark's truck is gone, and goes to the bar by the intersection to wait for Mark to drive by on the way home to be sure Dylan was at the house when he got the call (or to know it would be necessary to drive to Bayfield to meet up with him.) Because ******* doesn't want anyone to remember seeing him/her in the area, s/he stays in the car, but parks at the bar/store to look less conspicuous. While ****** is sitting there, Dylan shows up and they talk for a minute. Dylan gets into the car, they go back for his backpack, and phone, and they leave.
Even though I did leave the possibility of the person being female open, I don't see it being Elaine since it would have been fairly obvious if she wasn't near CS when she received word that he was gone, or when she called the sheriff.
Some time after Mark left for Durango, Dylan woke up, ate breakfast and discovered that his phone was dead because he fell asleep Sunday night without putting it on the charger or turning it off. He plugs in the charger, starts charging the phone, and decides to walk down to the store at the intersection of 500 and 501 to grab something they forgot to get at Walmart (chocolate, drink, whatever) while waiting for it to charge.
Earlier, ****** drove to the area planning to call Dylan and have him meet him/her down the road a bit. S/he drives by the house and sees that Mark's truck is gone, and goes to the bar by the intersection to wait for Mark to drive by on the way home to be sure Dylan was at the house when he got the call (or to know it would be necessary to drive to Bayfield to meet up with him.) Because ******* doesn't want anyone to remember seeing him/her in the area, s/he stays in the car, but parks at the bar/store to look less conspicuous. While ****** is sitting there, Dylan shows up and they talk for a minute. Dylan gets into the car, they go back for his backpack, and phone, and they leave.
Even though I did leave the possibility of the person being female open, I don't see it being Elaine since it would have been fairly obvious if she wasn't near CS when she received word that he was gone, or when she called the sheriff.