You don't need the internet if you have the actual DVD disk with you. You would need to have a way to charge the battery for your laptop though so you may need to buy a inverter for that. Like this:
http://www.amazon.com/Wagan-2003-6-400-Watt-Continuous-Inverter/dp/B002UW7JJ6/ref=sr_1_8?s=automotive&ie=UTF8&qid=1300853235&sr=1-8