If you're thinking you'd like to have the backpack with you for hiking, the Burley Travoy seems like it'd make the most sense. The Travoy would be ideal for situations where you want to ride your bike to a hiking trailhead lock up the bike out of sight and then go backpacking.

If you're not planning on using the backpack for hiking but are planning on riding off road, you might want to look into bikepacking systems.

I think panniers are the ideal for road tours, but trailers work also.

Found this on the BF archives. Looks like trrubicon06
has made a homemade version of the Travoy.