My conjecture, to add to the many, is he was booking 3 rooms at the other facility because others were involved in that projected shooting and he was part of a subversive group. He then had two adjoining rooms in Las Vegas. I still suspect another shooter/helper in Las Vegas who escaped. Maybe the “helper” had orders to kill him when the mission was accomplished since he was well known to the casino and would have been easily found during an escape. I think part of the plan was he was assured safe refuge somewhere, but that Marylou couldn’t come...that’s why Marylou received a $100G pay off in the Phillipines...she was being dumped.
I’m still keeping my money on ISIS. They generally don’t claim acts they aren’t involved in and they also have a fetish (apparently) for music venues, see the Bataclan and Manchester Arena. The fact that they have continued to claim this and our agencies inability to find an ulterior motive is interesting to say the least.