Road Morph zip tied to the top tube. Great pump. Don't over think it. Team the pump with better tires. I use Schwalbe Marathons. Many here go heavier. It's all about comfort level. The heavier you go the less likely it is that you'll ever need the pump for more than just topping off the air pressure in the tires. IMO, with regard to loaded touring bikes, there is no performance penalty for using heavy tires.

Another option would be to buy a trailer and just throw a floor pump in with the kitchen sink!!!