Darth Lucas said:

I have run into another problem and I'm not sure how I'm going to get around it. The whole bit with Luke and the wampa is completely gone. We now jump straight from arriving at the base almost directly into the battle of Hoth. This poses a problem that I feel really dumb having not foreseen. Luke not being attacked by the wampa means that we lose the scene where Ben's spirit tells him to go to the Dagobah system. I cannot for the life of me think of another place to put this scene that would make any sort of sense. Any ideas would be greatly appreciated. Thank you.

I thought a bit about this, this morning and I think there could be a way to salvage Ben telling Luke via his ghost visually.

After they have landed and you have any exposition out the way that you want to do there will be a cut to the empire to catch up with developments there.

You could then leap back to the start of empire strikes back and show Han and Luke out on Taun Tauns but not show any probe droid shots show Luke being attacked but not dragged away.

Cut to normal people asking where Luke is

Cut Back to Luke lying in the snow removing the Wampa cave only with ben talking to him

Han still resues him.

Remove probe droid that Han and Chewie destroy or alternatively leave this in. As it's entirely plausible that a probe was lanched before attack. But Luke was checking a meterite at the begining. So you could introduce the probe at a later point if you wanted to.

I hope this might help you out... I think it would be a bit weird not having this scene just trying to find a way to keep it somehow. As this is the first time we will hear from him since he has just died.