The beach is a significant distance from the restaurant. He would have driven to it. He apparently felt it was important to report her missing to someone in person, as he had a cell phone in his possessions. Assuming he knew it would take this much knocking on doors, etc. and was part of the plan however is a stretch.
The last photos of them are from a surveillance camera, not a blackberry. If you look at JADS FB you can see the cameras. I don't have the exact link.
http://facebook.com/jadsaruba
He was scouting the area the day before IMO. He also wanted to have more sex with her before killing her, so that is why the death occurred on Aug 2. MOO.
The case will get a murder conviction because of the fraud on her beneficiary form, the 1.5 million dollar premium policy taken out on her, his story inconsistencies, his past showing his character towards women, and the fact future Aruba tourism depends on getting tough on this type of crime. MOO.