Whew! At least you didn’t name your son after me. You might have cause to regret that some day.
As for backpacking, first you try to arrange your schedule to minimize missing Mass. Next month’s Catholic Answers hike in the Sierra Nevada was done just that way. We’ll be on the trail from Tuesday through Friday, giving participants plenty of time before and after to get to Mass, even if they have to drive a full day to get to the trailhead.
In other cases you can go off trail to find a Mass. This is easier in the eastern U.S. than in the western. The Appalachian Trail, for example, frequently passes through or near towns. It would not be possible to get to Mass, though, if you were hiking the 211-mile John Muir Trail, which goes from Yosemite to Mt. Whitney. Nowhere along its route is there a town, and the nearest off-route towns are not near at all.
So does this mean Catholics are excluded from such hikes, including the one you are planning? Not according to any theologian that I have come across. There are exceptions, as you know, to the Sunday obligation–illness, of course, and job duties (for policemen and the like) and even just considerable inconvenience. Many theologians, when asked “How inconvenient is inconvenient?”, say that those who must travel more than an hour to get to Mass are excused from attendance.
Let’s say you live in a rural area. The church in your town no longer has a resident priest. A priest comes once a month to celebrate Mass there. The next closest parish is two hours’ drive away. Are you obligated to go that far three Sundays a month? No. Are you then obligated to move so you’d be within reasonable driving distance of that other parish? Again, no.
It’s somewhat the same with travel, including backpacking. You are expected to make reasonable arrangements, but you are not expected to do what the Church does not demand. (If you can get a priest to go with you, that’s great, but how many can do that?)
Would it be all right to give up living in a rural area where there no longer is a regular Mass? Sure. Would it be okay never to go on a trip that puts you out of range of a Mass? Sure. But neither is required of you by the Church.