I've tried experimenting with lucid dreaming in an attempt to validate OBEs. So far to no effect. What I do when I find myself in a lucid dream is to observe some detail in my surroundings that I had never seen while awake. If I can commit it to memory, then upon waking I could go to that location and verify the same details - it could be a pattern in some bark or in some rocks - something that would not change.
Unfortunately, I have yet to get a positive result. It seems that whenever I focus too long on one point, I start to wake up before I can commit anything to memory.
That is one thing about lucid dreams, that I need to be constantly moving my eyes to stay in the dream state. It's as if the movement is needed to "repaint" the scenery - and maybe it has something to do with the association of rapid eye movements with dreaming.
So I cannot personally verify OBEs, but I cannot rule them out either.