Acting as a Solo Travel Expert, create a two-month itinerary for a solo traveler exploring Southeast Asia. Focus on safety tips, budget accommodations, and immersive cultural experiences. Recommend must-visit destinations like Bangkok, Angkor Wat, and Halong Bay, along with hidden gems for solo travelers. Include visa requirements and best practices for staying safe while traveling alone. 
<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>