You're right. When I began that area I had the idea of making thicker walls, but for some reason I forgot all about it! I'll go back and edit some of them to be more than one tile thick. ^.^; Thanks for pointing that out, heisenman.
Oh, and I will keep the idea in mind of subtly guiding the character along, Arrow, it's just that in smaller, closed off maps (which I tend to use) a more pronounced guide isn't really that necessary. Most of them only have two or three ways to exit the map and they usually don't go over 50x50 size-wise. (Besides, snow tends to get rid of trails and pathways that aren't set in stone. And wilderness areas don't really have many paths as is.) But I will bear it in mind for more civilised maps.