Eight self-drive itineraries to the center, north and south of Thailand, including accommodations, are offered by Asian Trails, Ltd. (9th Floor, SG Tower, 161/1 Soi Mahadlek Luang 3, Rajdamri Road, Lumpinee Pratumwan Bangkok 10330, Thailand; phone 66 2 626 2000; fax 66 2 651 8111, www.asiantrails.net).
Example — the Chiang Mai-Sukhothai Loop offers views of the Yom River, Kamphaeng Phet and Mae Sot. The 6-day package costs $223 to $381 per person, double occupancy, depending on the car chosen. The single supplement is $120.