I would have all of the following:
Couple Hundred Bucks in Caysh
Credit Card
At least 6-10 cds
Your Radar Detector - preferably a Valentine One
Some Gum/Candy - i'd go with Trident orange and sprees
A couple bottles of water
Cell phone
Once you have all of this ready, simply open the door for your gorgeous female riding companion, unlatch the top, close the trunk, get behind the wheel and have a freakin' blast.
I actually find the viper to be one of the most comfortable sports cars to ride long distances in. Your **** should be fine, but if it gives you any issues, simply pull over and ask your gorgeous female riding companion for a little massage.