Thailand is part of the PCI
https://www.riderchris.com/info/thailand-laos-border-crossing/
In a nutshell, you will need;
1. International Driving Permit (IDP). PCI
2. Supporting letter from CANADIAN Laos Embassy
3. Third party Lao Insurance for vehicle.
4. Temporary Imported Passenger Vehicle form.
6. Vehicle registration card (Grant / VOC).
6 (a). Authorised letter from the vehicle owner & copy of the owner’s N.R.I.C./ Passport (If the vehicle is not on your name.
7. Passport valid for 6 months at-least.
8. Copy of your road tax – Ensure it is not expired.
9. Visa – (Not needed for countries that have been exempted).
10. Immigration forms (Arrival Card).
https://www.go-myanmar.com/arriving-and-departing-over-land
WEATHER AND SEASON:
Although the climate varies throughout Thailand, you can visit all year round. The best time to travel is during the cool and dry season between November and early April. In the south, the climate differs between the eastern and western coasts. The west coast is more favorable during the winter months, when diving and snorkeling will be at its best. The weather on the east coast is good for most of the year, with the lowest rainfall in January and February and the highest in November
Embassy of Canada in thailand:
15th Floor, Abdulrahim Place
990 Rama IV Road, Bangrak, Bangkok 10500,Thailand
Telephone: (66) 0-2646-4300
TTY: +1 (613) 944-9136 (Ottawa)
Email: bngkk@international.gc.ca
For immigration and visa related inquiries: bangkok-im-enquiry@international.gc.ca
Mailing Address:
P.O. Box 2090, Bangkok 10501,Thailand
http://www.canadainternational.gc.ca/thailand-thailande/contact-contactez.aspx?lang=eng