Be sure to stop at Cubby's, mile 99 on the Parks highway, its on the corner of the Parks and Talkeetna spur road. this is the last place to get groceries at good prices. their deli is great and the broccoli salad is awesome. once you get past here, prices go up quickly.
hope you make it to AK next summer.
you can also check out the BLM site: http://www.blm.gov/ak/st/en.html¬