One of the big things I think you're going to run into right off the bat is that that kind of a scene is going to be a HUGE memory hog, and though Vue's memory system is very efficient with most objects you're going to run into a barrier at some point, probably not even close to the whole ten mile stretch. The new Vue 5 infinate shows promise for solving some of these problems but I don't know how much of e-on's hype will pan out, and probably won't know until people start actually using the program and giving out feedback. Anyway, I would suggest doing individual shots with high detail and skip trying to do the whole thing as one, just my opinion though.