It is indeed an offer. One made after a good deal more consideration than most people would require, but an offer nonetheless. And, when the stranger takes him up on it, Maine nods in understanding.

If Nida lets him, Maine will take a good chunk of the wood (read: most of the wood) from Nida's arms. Then he'll turn and continue his way towards the inn.

While the Freelancer doesn't make a deliberate effort to clear the path, he doesn't really need to: his size takes care of it whether he means to or not. As long as Nida sticks close, he'll have a relatively easy trek and avoid the majority of the wind. The only downside may be hearing Maine's low growling when a particularly strong gust of wind sends a fresh wave of cold through him.