I've had a couple over the years but never really seen the appeal of Opinels. The folding element is either too stiff or too loose, same for the locking ring until it gets a bit of detritus in it then it seizes altogether. Obviously someone must like them as they have been around for a day or two.
In addition to stalking knives, I have a Leatherman Wave on my belt virtually all the time and, when this isn't appropriate, a Victorinox Huntsman in my pocket. Technically I suppose the Leatherman is a locking knife but, with a bit of common sense applied, I can't imagine there ever being a problem.
The only time I've ever had an issue with having a knife in public was on a visit to the Natural History Museum when my SAK was picked up by a metal detector. It was no drama, the security guard simply pointed me to a bank of tiny little lockers and asked me to leave it there and collect it on the way out.