It takes less than an hour to send a brief email to all of the Senators on the National Parks Subcommittee using the contact form on their websites. This site lists the members of the subcommittee: http://www.energy.senate.gov/public/...national-parks
Their names link to their websites.
All you have to do is ask for their support on S 2372. None of these senators are from North Carolina - they will support this bill only if they receive more requests in support than in opposition.