The Star Wars Incredible Cross-Sections book portrays Speeder Bikes on Hoth. Also, AT-AT's carry a number of Speeder Bikes, so I'd find it odd if there weren't Speeder Bikes on Hoth.

Get Cloned.

I ment that they would be a part of the ATAT model itself, so they wouldn't move around strangely.  As for speeder bikes being on Hoth, there were non in the movies, but I guess it couldn't hurt.  But the thing is, I can just see some jerks grabbing the bikes and just rushing into echo, bypassing the trenches cause they're too fast to shoot.  It would be cool, if they were on the ATATs, if they couldn't be taken out of the ATAT unless the pilot opens a door for them.  People would have to ask the pilot to release his speeder bikes.

That sounds good, but thats a lot of speeder bikes on Hoth, I was thinking more like 1-2 in each ATAT.  I know they supposedly carried more than that, but for gameplay I think that less would be better.  Plus, as long as the AA missiles track the speeder bikes, I think the rebels would have a good defense against them.