Just talked to my Mrs on the phone, she is at Satun (southern) bus station in Bangkok on her way back from Roi-Et. The bus ride from Roi-Et was very smooth 6-7 hours with no problems from the army. No extra checkpoints or anything, just as on any normal day.
Hopefully it will be the same from Bangkok heading south........I'm picking her up at the bus station in Ranong at curfew time 04.30.