Is it advisable to make a same-day border crossing with a 6-month MTV visa?

The user is seeking advice on making a same-day border crossing from Mukdahann to Savannakhet on a 6-month MTV visa before their first 60-day entry expires. Comments suggest it's feasible to cross the border in a single day without staying overnight, although one commenter inquires about the possibility of a 30-day extension at local immigration.