Drafting is very dangerous. If you're too close to the car in front and it suddenly brakes, you've got an accident on your hands. And it doesn't have a big effect on fuel efficiency anyway.
Alaskan oil reserves aren't the solution. ANWR only has about one year's worth of oil at our current consumption rate.
http://en.wikipedia.org/wiki/Arctic_Refuge_drilling_controversy#Estimates_of_oil_reserves
Biofuels aren't a good large-scale solution because the more agricultural land we use for fuel crops, the less we have for food crops.
The best solution is electric vehicles. They're far more efficient than internal combustion engine vehicles and would drastically cut our dependency on oil. And there are some really good EVs soon to be in production.
Available in California in October 2008, the Aptera typ-1e will cost about $27,000 with a top speed of 95 mph and range of 120 miles per charge.
http://www.aptera.com/details.php
Soon thereafter Aptera will introduce the typ-1h, a plug-in hybrid version of the typ-1e with a 40-60 mile range on purely electrical energy, and a range of over 600 miles total when in electric/gas hybrid mode, for around $30,000. On a 120 mile trip, the typ-1h will get 300 miles per gallon. The shorter the trip, the higher the efficiency.
http://www.aptera.com/details.php
Available in 2009, the ZAP Alias will cost $30,000, have a top speed of 100 mph, and a range of 100 miles per charge.
http://zapworld.com/electric-vehicles/electric-cars/zap-alias
Soon thereafter the ZAP-X will be available at a cost of $60,000 with a top speed of 155 mph and a range of 350 miles per charge.
http://zapworld.com/electric-vehicles/electric-cars/zap-x
Available in 2009, the Miles Javlon will cost $30,000 with a top speed of 80 mph and a range of 120 miles per charge.
http://www.milesev.com/
Phoenix Motorcars will start selling their SUT to individuals in 2009. It will cost $45,000 and have a top speed of 100 mph with a range of 100+ miles per charge.
http://phoenixmotorcars.com/