We are 64 and 57 years old respectively and will continue to sleep on the ground on occasion after we begin using our 17b this January. The piece of equipment that makes this possible is our Exped 9 pads. DownMat 9 M | Exped USA. These things are almost 4" thick and are FAR more comfortable and warm than any other mat out there. Not cheap but if you want to continue camping, consider this piece of equipment.
+1. Great air mattress