Longest stretch between CSs is 161 kms in MHS, then 237 if wanting to go down to Mae Sot, so I'd say yes Of course if living there, you're charging at home.
CM - MHS is 239 kms, so I'd say yes, again. Certainly not ideal, but that, is one of the only places, that doesn't have more than enough, but DOES have enough.
If you want to pick a spot that pushes the limits, you should have chose Loei to Utteradit, as that's shy of 300kms, without a slight detour top to up.
As many say, EVs are not for everyone. Enjoy what you have, and let the EV owners enjoy their ride, and the extra baht in their pocket, or knowing they are not contributing to the local air pollution.