Thanks for the suggestion, but I was thinking of going on a Friday and returning on a Monday rather than travelling on consecutive days. My physical problem is poor blood circulation, so that I need to walk around a lot. I can stop when I am driving and do that, but it is not normal to get up and move around in the immigration office. As for hotels, I have tried that and just slept badly because people go to Hua Hin to have a good time, which generally involves making a fair bit of noise.