Please forgive me if this has already been discussed ...
Does anyone else find it strange that NONE of Dylan's things were found at MR's house?
Yes, a lot of us do.
Was DR ever really in the house?
LE says it was confirmed that Dylan made it to the house, but we don't know what they are using for confirmation or what "arrived at Mark's house" means. (did he just arrive but not go in?) March 19th press release
Or did DR get to the house and there was there a huge fight between MR and DR and then DR decided to pack up and leave and not go back? Would he have done this in secret? Or would he have told MR and then MR went after him?
No one knows. It is one of the many speculations.
Is it even possible that DR told MR that he was going to stay with his friend or his GM?
See above answer.
If that's the case, how was he getting there and why is all his stuff missing?
Exactly.
The poor kid, he was vulnerable way out there in the country. He was too young to drive and IMO he would have felt trapped if there was a fight and no one there to help him, not his brother or his mother or stepfather or his friends.
But he should have been able to contact them with his Cell phone, iPod Touch, landline or computer, and he did none of the above
DR walked into a highly charged situation that he wasn't used to anymore and wouldn't have the coping mechanisms to deal with it IMO.