My keyboard....AND S&T. With 3 you can drive to the ramp, yak land to camp, and yak back. S&T gets you to A/B/C and D in LA or San Diego, Topo leads thru the outback.
I use a Dell 9400 on the van's doghouse for en route GPS. Passing/stoplight folk call the HP to alert for an out of state nut watching TV n driving.
SPACE ALIENS !