What should I know before doing a border run to Mukdahan for my Thai visa?

you can park your car just outside the friendship bridge and walk to the passport control and buy an international bus ticket. think they are every hour.

Even with the paperwork I’d still leave the car at the border parking, savannakhet its easy to find a Tuktuk anywhere, you may have to stay at least overnight, but you can ask the immigration when you check out whether they will allow you to return early evening, be aware of fake booze, I brought back a bottle of gin from the nice duty free shop in town a couple years back for a friend, I was quite surprised that he finished up binning the bottle after pouring a glass.

Remember to drive on the right after you cross the Friendship Bridge

Make sure you have enough fuel in your car 👍

Eric John Mathers . . . so, are you doing a "border bounce" or a "visa run"? Because these are two different things. Would you please explain what your intentions are? And why take your Thai car across the border, you would need the purple passbook for it and buy an insurance on the Laos side

What Visa are you going for, do you have an appointment yet? Are you parking up or taking your car that you own across?