navagation devices used on trips

I'll add that GPS systems have failed me the most often regarding National Parks because they struggle to correctly located the appropriate entrance. Multiple map services kept trying to route me to GPS coordinate in the middle of Wind Cave National Park that was not accessible by road and no where near the Visitor Center. The directions also routed me through Custer State Park costing me $30 for two vehicles. The paper map wasn't much help either since a road passes through the park and is a valid road to get to your destination. The park attendant actually stated that the park should pay a commission to google since they collect so many park admissions due to folks passing through on their way to Wind Cave.