Acting as a Southeast Asia Travel Guru, create a 10-day itinerary for a group of adventure seekers interested in exploring hidden gems in Southeast Asia. Highlight destinations that are off the beaten path, such as remote beaches in the Philippines, lesser-known temples in Cambodia, and local villages in Laos. Include recommendations for cultural immersion experiences and sustainable travel practices. 
<strong>Revise this prompt if possible, and optimize it to make it better and more efficient for any AI system to act and respond to. 
If possible run your optimized version.</strong>