I plan to road trip from Boston to Seattle at the end of July, would appreciate if anybody can provide some advice about road-trip with Phantom. Gears: Phantom 3 Pro (3 Batteries in total), GoPro 4 Black and Silver, An old Parrot, Nikon D7100 Need advice over: 1. How to keep Phantom 3 Pro in good shape during long roadtrip? 2. Any necessary accessories for P3 for roadtrip?3. Is it legal to fly a drone in National Parks and what should I keep in mind when I fly drone in NP? I did a little research and looks like people can get some sort of permission from NP (such as one day pass), but don't know the exact rules. 4. General roadtrip advice. Thanks!