The most accurate map for August 21’s total solar eclipse
Best advice I've accumulated so far:1.  Don't plan to drive anywhere on eclipse day (90% of the US lives within an 8hr drive of totality, so traffic will be horrible)2.  A 600-800mm lens is optimal for photography.  Anything short of 200mm is useless.3.  Don't make any solid plans until 3-4 days before.  Most places only have about 40% chance of it being clear.4.  If you're photographing the partial phases.  Stop and check everything (batteries, memory card, focus, etc) about 5 min before totality.5.  If you have any technological issues during totality, just sit back and enjoy watching it.6.  On eclipse day, if you're in a place that has 2 min or more of totality, just stay there.  There's not a lot to be gained by risking moving.7.  All across the US, the sun will be high in the sky, good horizons aren't necessary.