Did my first border run this weekend from Chiang Mai to Huay Xai - after much research and overthinking I decided to book 2 nights in Laos to cover myself. Arrived at the friendship bridge and was given a card that said no 2 day run unless you had certain criteria (can't remember exactly but 10000thb available etc), told them I had a DTV visa and was then told by the lovely immigration officer 'oh you have DTV it's multi entry you can go and come back same day, sabai sabai!' 🙃
Not sure if i just got lucky with a nice IO but sharing this info in case it's helpful to anyone needing to do a run up north soon!