The goals will get more complicated as we progress, it will be too confusing to type out. Let's utilise your 15 pics slots from your 3 posts, 5 from mine and 5 from summit to the fullest.
Morgan goals will be the bulk of the event so we need all the slots available. You have 3 posts so you plan, summit and I will go with your plan. For now what I can think of is this. We likely need 3 posts for Morgan's goals. You use one of your post and start Morgan's goals, I'll take over when your slots are full. Summit can take over me when mine are full. (Ie use posts #3,4,5 for Morgan's goals)
Pm me, I'm going offline shortly.