I also put that I'd like a peek at the buyer's DL or WCL, but honestly, can't recall ever asking to see it once we actually met. Usually involved in too good of a conversation with a new gun-loving ODT brother (have yet to meet an ODT sister).
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I think you are overthinking this. I don't mind showing my driver's license. My sense is that most ODT don't either. But anything more than that is a deal breaker.
I think some of the ODTers over think the issue too. there's nothing to stop you from taking a picture of me, my car, and car tag.