@Kylie ****
Yes, but I’d be careful. Chiang Khong–Huay Xai is still commonly used for DTV border runs, but policies and immigration practices can change. It’s best to check recent reports before going.
You could also consider reading a book or two before your trip. I’d recommend Unlock Thailand by Isla Rey on Amazon—it includes all the info and insights you need. You should check it out. A very good companion.