I'm doing a day trip to Siem Reap shortly and would like to ask a question. Our flight arrives at 9am and the journey continues at 7pm on the same day. I was planning to hire a driver for the day and visit the most important temples.

Since we would be having all our luggage in the car for the day, how big of a risk is it that the driver simply leaves with all our stuff instead of earning the $25? Should we book a reliable driver in advance to minimize this risk?