Unless you are riding highly technical, rocky single track I would question needing any type of suspension. If you are doing dirt, gravel roads many of the newer bikes would serve your purpose.
I know you are leery of a 29 style due to size but if you ever have a chance ride the XS Surly ECR - 29 X 3 inch tires - the tires give you the suspension and they roll over pretty much anything without any drag. The Surly Troll is a perfect bike for what you are describing as well. Looks like beautiful country.