If you get in your car and put the destination in your navigation system, the car will tell you if it can make it to your destination and how much battery percentage you will have left. If you cannot make it on a single charge, your car will provide you options to charge. You can also use PlugShare as rtkaul suggested. You can also go to
EV Trip Planner, put in your car info and as such, and see if you can make it without a charge. I found on my cross-country trip (7200 miles!) the evtripplanner is conservative by approximately 5%, so if it says you can make it, I would believe it.
Here's an example of a Model S with 19" tires, 68 degrees inside temp (a/c on), 80 degree exterior temp, 200 pound payload (just you!)
Distance 219.7 miles
Driving Time 3:28
Total Energy Used 66.6 kWh
238 RM
Average Efficiency 303 Wh/mile
Net Elevation Change -564 feet
At 238 Rated Miles, if you max charge at home, you will have plenty to get to Massanutten, but you will have to charge there (abviously) to get anywhere after that (like home!)