Hi Donald---- I don't claim to be an expert on the subject, but even with an ID card you may be questioned about your purpose of visit. This question was asked of me a few weeks ago by a female agent. My reply was, 'vacation'. She then flipped through my passport and said something about me visiting Thailand about once a year. My response, "Yes, Thailand is a beautiful country." She gave me a warm smile and passed my passport back to me and said something about welcome home. A close up of ID card sounds like a good idea, even though it leaks the information about your choice of friends in Thailand. I don't want to scare you, but depending on what officer you get, you can really get grilled on the purpose of your visit and they may really look into your laptop. They can do this whether you have a laptop or not.
Most of the time it is a quick trip thrkough customs, but one time in Atlanta, the officer took most of the things out of my bags but let me go after finding nothing out of the ordinary... Wow was I glad I gave the last of my condoms to the bartentder at the hotel where I was staying. The young man tending the bar thanked me and said he was happy with farnag condoms as farang customers request one once in a while and tip well for them.