@snow, Looking at the picture I do see what you mean. There is a little front porch area which could easily get muddy, but I think as long as it stays dry IN the tent that's where it really matters!!
And porte-cochere (haven't seen that word in a long time!) is the perfect way to describe the front of that old umbrella tent!!! I guess we can say it's a porte-cochere in miniature and a canvas one to boot!!!