We were expecting to lose the day traveling but we found a way to be collected from our hotel in the morning, whisked off to one of the popular attractions and then be dropped off in Chiang Khong in the afternoon. Intrigued?
Following a glowing PM from another forum poster (thank you M), we decided to book with Bruce J for the ATV adventure and will be collected from our hotel at 08:00 and dropped off at Chiang Khong about 15:00. Apparently, they are located on the main Chiang Khong highway out of town.
Perhaps you should mention this under travel to Chiang Khong Broder?
If anyone is interested, I'll post a review afterwards?