Too much time passed before she was reported missing, IMO, to make a good estimate. The perp may have even moved her, once he realized no one knew she was missing on Wednesday and into Thursday. Also, there does not seem to be a solid sighting and time as to when the truck was parked at the landing. JMO
The thing that is really tricky in determining the disposal site here on WS is that if the perp(s) is reading here, he/she could move the body if someone makes a warm post. The good thing though is that if they are a POI, unnamed publicly by police, then chances are that person is under surveillance so can not do any moving. Not to mention, depending on what the specific site is, sometimes a body is incapable of being moved.
Also, I didn't want to mention this earlier to give the perp any ideas, but one thing that also could occur is for the perp(s) to move the body to an area that has already been searched. That is another reason why it could be important to keep going over areas previously searched and cleared. And, as we've seen in other cases, sometimes things are missed in searches the first few times through (for example, Gabrielle Swainson).
Also, when tips are submitted to LE, on possible areas to search, one never knows if those are ever actually followed up on or pursued.
Agreed Woe and Wondergirl, we are definitely a team effort here combining various skills, talents, etc.
If we are going to hypothesize on OMs involvement (or anyone specifically), then the main thing I think is to look at awareness space including occupation, acquaintances, frequently traveled routes, hobbies, lands, work assignments, equipment used by / known to perp(s), etc etc etc. So many things that can and need to be researched. But as I understand it, unless a POI is named, we can not talk about specific areas relating to this person (or any other persons).
Thinking out loud, maybe its worthwhile going back and taking another look at things and places associated with the Tier 3 RSO who lives in Heather's condo community, not to mention the other 3 RSOs she could have possibly been in contact with via work.