Is Local Storage as Needed

With one of the projects that I’m working on these days, I find that it is helpful to use Google Docs for a lot of the work. Part of this is because I am between several cities, but the other reason is that in respect to the many of these documents are going through several rounds of reviews and converations. The end product is usually that ownership is shared, and that I’m usually travling when we are conversing about them. So, do I really need to store/edit everything locally for anything more than archiving?