I did a packing and loading exercise yesterday, and managed to get my gear, plus food for 3 or 4 days, into the two Ortlieb Classic panniers I've borrowed from Alice. They are a little larger than my Kathmandu bags, totally waterproof, and they have a great advantage - they don't fall off and jam in the spokes when you hit a bump! The bike was a bit heavier in feel, but riding it felt well balanced. However it is now quite difficult to swing my leg over the seat. I may have to revert to straddling the bar then getting going.