Instead of wandering into a camp of Romans, why don't we intercept some supplies on the way in? Probably less heavily guarded and filled with less deathy goodness.

Also out strange appearance could work in our favour ala War Elephants or just being physically bigger than the Romans.

(Re-watched a lot of Time Commanders recently, in between screaming at my monitor due to the stupidity of some of the guys on it you learn some interesting stuff)