If you no longer require full hookups, there is a beautiful public campground at the Hiland/Eagle River Loop exit (first exit heading out of Anchorage). The exit splits into two lanes, stay left, and go straight at the stop sign, it will take you right down to the campground on Eagle River. Otherwise head out toward Palmer, a few miles after the highway splits (Wasilla/Palmer interchange) there are campgrounds on the left.
2014 Wolf Creek 850SB
2012 GMC Sierra SLT 2500HD 7,220# Truck/10,400# Camper Fully Loaded