I've noticed that my most vivid, weirdest, and easily remembered dreams happen when I am napping. That or I just remember them better. I've also heard these things from other sources.

But does this increase the chances to have a Lucid Dream or are the chances just as much as dreaming at your regular time at night? All the lucid dreams I have had occur while sleeping at my regular time. But then again, I don’t take naps too often.