Thanks everyone for your information, really appreciate it. My wife will be ok at the Grand Canyon, it's getting there. She has such anxiety on the roads (couple accidents not our fault), but very nervous on the mountain grades. We do Jellico Mountain going to Fl and she's much better now with that one, but even the WVA Tpke. freaks her out anymore & we've traveled that many times. Planning on getting a 19' travel trailer instead of the big RV, so hopefully she'll calm down a little. Any more info greatly appreciated.