Matt is better qualified than I am to answer your questions and will be along shortly, but I will have a stab at it too, if you don't mind
My thoughts are that the extra beam in this boat should make little difference to paddle speed unless the boat is heavily loaded, and even then, the difference in paddle speed should be marginal at most.
Stability - will be more stable than the narrower boat, and hence, better suited for fishing
I think the boat would have no trouble handling a cooler and camping gear for solo paddling. Not really a tripping model but should be fine.
I like this little canoe - a lot. If I didn't allready have half a dozen of Matt's other lovely boats that I want to build, this one would be pretty high on my "to do" list.
The Sas 16.5' X 33" is a magnificent canoe. is rock solid stable. This one should be just as good.