How many are too many? That’s the question to mull in the wake of news from the National Park Service that nearly 300 million visited the National Park System last year. What is the perfect number for annual visitation to the park system’s 423 units?  To help sort out the pluses and minuses of 300 million visitors a year to the park system, and to offer you some suggestions for escaping the crowds, we’ve asked Becky Lomax, author of USA National Parks, The Complete Guide To All 63 Parks to return to the Traveler to discuss visitation.