You know, as I was typing my original post, I was thinking that fading out Ben's ghost on Hoth would be a neat touch. Then again, ChainsawAsh and Teharri raised valid points - Leia doesn't see the ghosts right in front of her on Endor, and so it follows logically that Han wouldn't be able to see Ben in a snowy haze and from a distance.

But would it possibly give the interaction with Ben and Luke more closure if the ghost faded away before Han rides through it on the Tauntaun? In Empire, Ben is not one to linger - he dissapears when Luke's X-Wing takes off from Dagobah and shrouds the area in shadow, then when the shadow clears, Ben is gone but continues to talk to Yoda disembodied. So it could also tie in with the flighty nature of the Force Ghost.

Look at me getting really sucked into this! Eitherway, Adywan, I'm glad (and yet unsurprised) to hear you were already planning away with regards to the Force Ghosts, and I'm sure the finished product will be great!