I think you'd be a much happier jack in a true solo boat than trying to reconfigure a Northwind.  I'm sure it can be done, but wind is going to be more of a problem than you think, even on small lakes.  Your odds of being windbound will go up enormously soloing a tandem rather than paddling a true solo.

However, if you really want to do it...

"Seems like it would fit" won't be good enough if you are going to move a seat.  The seat will need to fit the width of the gunwales very closely wherever you install it in order to not significantly stress the hull.  If yours isn't very close to an exact fit, then you'll need to buy a new seat (not too expensive) and cut it to fit the new location. 

You also likely would need to add thwarts where you remove seats as a seat acts just like a thwart as far as eliminating unnecessary stress from the hull material by helping the boat (and gunwales) to hold the proper shape.  Do you really need to remove the seats for anything other than aesthetic reasons?  If not, I'd just leave them as is.

"Before I went to all that effort, I'd just paddle it backward from the front seat"

don't think that would work very well at all, with the differential rocker - would probably work better paddling from the stern seat with most all the gear far towards the bow for trim

my thoughts are you should just rent or buy a dedicated solo boat

and at the least, take that boat out on the lakes and see what heppens when you paddle it solo in the wind - I'd think it would be hard to control and hold a course in the wind

Happjack -- I tried using my Northwind as a solo years back.  It was a pain.  I agree with snow_dog: I'd get a solo canoe to make a solo trip.

prouboy

 I'd say a little experimentation is in order.

 Load it with your full packs, try paddling from stern and reverse front and see what works for you?
 
 Worse case scenario you learn you need to rent a true solo.

Better finding out now, than struggling thru a trip, dreading being on the water when the wind picks up.

Thanks for the comments.  I have used "true" solo boats and I know that is probably the best way to go, but I'd like to save $30/day.
My Northwind has the wood trim option, so to put a seat where I am thinking only requires drilling 2 additional holes, both through the wood inner rail.  I would use the existing thwart holes for the others.  It seems like a prudent option.  There is even a narrower (looks like 4" versus 8" at the seats) piece of structural foam in that position of the hull sides.
As far as handling, I paddled with my 2 boys last summer on some big lakes in a strong wind.  They are not strong paddlers so I know what it would be like to paddle it from the stern solo.  And I know the boat will be riding higher with just me, but that is why I like moving myself closer to midships.  The canoe should be much easier to handle solo from closer to the middle.
I think I will go ahead and give it a try in the next few weeks or so on one of the local lakes and see how it does.  I'm pretty good with wood, so I will try to make my own canted seat supports based on the existing ones and a solid slab board seat for the trial.  If I like it I will see if the bow seat fits and use it or get another cane seat to use.
Now, if I had the $$$ I would buy a solo canoe, that would make 3 in the house, and it would be a Stewart River Traveler.