I've traveled solo to all 63 US national parks. Here are my 10 tips for first-time visitors.

I've visited all 63 major US national parks. Emily Hart I've traveled alone to all 63 US national parks and have picked up lots of tips along the way. Travelers should secure reservations ahead of time and visit during off-peak hours to avoid crowds. I encourage solo travelers to take lots of pictures during their trip. I spent my 30s traveling solo on a quest to visit all 63 major US national parks. A decade later, I've accomplished this goal — and to say I've learned a lot would be an und...