Here's my rig.
Haven't paired it with a bicycle, or bicycle touring yet, but it would probably be work great with my ultra-compact touring rig (Brompton + 30L T-bag).
I think it all weighs ~11 lbs and can be set-up in <10 mins. The spray deck is worthwhile if you want to do whitewater or paddle when it's cold out, but calm water/summer use, it's kind of a pain (more stuff to dry out). Keep in mind these things are pretty slow on water - don't expect much more than 1mph without a huge effort, and if there's any wind...

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