Read my Attorney At Work article on how lawyers who are dependent on the cloud can be productive even when offline:
Sometimes you just don’t have access to the Internet. Whether you’re traveling in a plane, or in a remote (or sometimes not so remote) area that has no WiFi, 3G or 4G coverage, or simply because your cable or T1 line is down due to weather or some other outage, on occasion you will have some forced downtime because you can’t access your cloud-based documents, send emails, or pull up a client’s contact information from a cloud-based provider. In fact, it is likely to happen at the most inopportune moment. Fortunately, there are ways to access online information locally.