This was my five cents worth yesterday to Gorio:
"I speculate that the desert area he first took her to the desert dune area, with perhaps an idea to dump her there. He claimed he left there after two of his planned four days there because none of his friends were there. Perhaps he found the area to full of weekend off-roaders, campers and the like to make a safe disposal. Also, his motorhome got stuck in the sand, had to get a tow truck to pull him out. Perhaps this spooked him, perhaps he realized he couldn't get to a remote enough place in that area with those kind of wheels. Perhaps he realized if the body was found there he would be a greater suspect.
He said he decided to go to the beach. On his way over route 8, he took a small side trip to the place the body was dumped, perhaps he was familiar with the road and area. It wasn't a well obscured disposal, but rash men do strange things, and he thought it was good enough, or the best he could do in a mad situation."
Thank you for the Casino information. My bet is he might not have gone to the Casino, but from his experiences going to the Casino recalled a relatively isolated spot where he could dump the body.