Hi folks, I've been driving class A motirhomes since 1997 and put quite a few miles on the rigs we've owned. our trip planning gennerally involves looking at our big old paper Rand Mcnally, and then verifying miles with the standard goolge maps gps on my phone. this has served us well for all these years. we havent driven out east much, though, and i ocasionally see people swear by RV or trucker gps units to alert them to low clearances and other hazards. do you folks use one? has it saved you from having a mishap with a low bridge? i've always thought the driver and copilot could look out for low clearance signs while driving and adjust accordingly. am i assuming too much? thanks, chris g.