Most Versatile Discount on State Parks and MiFi Question

There is no discount programs for state parks, except maybe handicap access. Some states will also give military discounts, but you have to usually apply ahead of time for that. So to answer your question...NO!
As for internet service. Many of us full timers use either the Verizon MiFi card or the same thing through Milencom,, 20GB for around 80 dollars a month and no contract.