Thanks Tim.
I was thinking I might try something like the origin8 drop ends to increase the grip positions. I don't really want to have to buy a whole new bar and then probably gear and brake levers.
The saddle is comfy enough for the couple of hours I spend on it two or three times a week. That sort of stuff I can play with over the trip.

I'm more concerned about carry and reliability. I have seen a couple of racks that are built for 29ers with disk brakes. Something like this
TopeakŪ Cycling Accessories ? Products - Explorer 29er Tubular Rack w/disc mounts
I think you can get kits that secure them to the seat post through a clamp too. A trailer would be a last resort.