Gary, I have been very happy with this seat cushion.
Wondergel Original Gel Seat CushionI too have back problems when I set to long. I think the best advice I can give you is to remember you are retired and don't have to be in a hurry! This will be the trip of a lifetime so slow down, only drive a few hours each day and stop to enjoy the amazing scenery! This is our third trip to Alaska and we usually arrive the second week of May and leave the third week of Sep. When we add a month each direction drive time from Fort Worth it makes for a pleasant trip.
I LOVE retirement!!!!!