My best mate is a Neo-Druid!
It is part of the religion, reincarnation is. So if some one is a true neo-druid, then yes they do believe in it.
Also for the person below, what you believe in is a type of Reincarnation.
This one doesn’t. In the Druid Revival, one can believe pretty much whatever they chose. There are Druids who are also Christians, Buddists, Atheists,and probably just about anything else. You just have to include nature in your spiritual practice.