The deference between ghosts and spirits are-
Ghosts: Are people who don't know that their dead- either they don't want to face the facts- OR they are earthbond. THERE IS NO SUCH THING AS UNFINISHED BUSINESS! Would you come down if you knew you were going to become a ghost? No way!
Spirits: Are dead relatives spirit guides and family Spot and your favourite pet kitty.
So there are the deferences yes- campers.