Aaah, that makes much more sense, I was speaking of moving to the surface from the landing barges, assuming that the barges wouldn't actually land on the ground, but instead hover a few meters up.

Your idea of ropes sounds good from the AT-AT, and as far as coding goes, can't you just use the Zip-Line code from the Special Forces expansion?

I think it would be a really good idea for the initial imperial vehicle spawn to be very far away from the rebel base in order to make using the AT-ATs as transports (what they actually are) a much better option than hiking on foot.  And as far as riding in the ATATs go, will there be any passenger seats with small gunports to fire blasters out of?  I think that would be really cool, but I'm not sure if it fits with the tech of the ATATs.  If not gunports, then maybe make a few passenger positions near the blast door so they can fire out while staying seated, but only while the blast door is open.

Hmm, did the AT-ATs carry the speeders, or were they deployed (along with AT-STs) as caravan support for the AT-ATs?   

As for gun ports, I agree with the seating position near the main door and using your rifle or repeater.  You could probably create a seating position on the top access hatch as well.  If it's possible to make a seating position rotate like a turret, than a top hatch position would be nice for taking pop-shots at incoming snow speeders.

Yeah, they carried speederbikes.

As for sitting inside, if you're not at the door it's going to be pretty much like the inside of the BMP-3 in SF, just immensely bigger.