What should first-time visitors from the USA expect at TSA and customs when arriving in Thailand?

First-time visitors from the USA arriving in Thailand can generally expect a straightforward process at both TSA and customs. After showing your passport, you'll receive a visa exempt stamp for 30 days, with an option to extend it for a fee. It's advisable to keep your boarding pass handy, as it's often requested during immigration. While waiting in lines could be a factor, they typically move quickly. Maintain good behavior and respect towards officials to ensure a smooth experience, as long as you have no prohibited items. Finally, budget time for potential long waits, especially during busy flight arrivals.