If you're in the woods in the Bemidji, MN area..... I doubt you'll encounter much wind driven, hard packed snow drifts like we can get here in North Dakota open areas. You'll do well with anything just a little wider than your rear tread spread.
And like mentioned above, on the rare occasion that you might encounter some larger hard packed drifts you can open up the first pass by lifting the blower up and take partial cuts into the drift. Drive forward, lower and back into again, repeat until you're through the hard packed drift.
I had the same JD750 tractor as
@PHPaul when we moved onto this farmstead. I put the 5 foot Lorenz blower behind it and the 17 PTO HP would struggle taking a full bite into hard packed snow drifts. But taking smaller bites while backing into, move forward, back into again, would get me through the hardest packed snow anywhere. Once through the main drift, just take as large a swath as you can with the HP you have. You'll have plenty of available PTO HP behind your tractor for 99% of your snowfalls.
Heavy wet snow won't throw near as far as the dry powder snow. You just adjust your methods for what ever conditions you're encountering on that day.
If you wanted to, you could also add a short "wing" to each side of the blower to get a little extra cutting width if needed or wanted.
If by chance your area does have alot of hard packed wind driven drifts, look at the "paddle type augers" on the Lorenz snowblowers versus the spiral cut augers most blowers have. I can attest to the ability of the paddle type augers on my Lorenz will chop through the hardest packed snow around while most of the spiral cut augers will struggle to cut into those drifts.
Edit: One of the other benefits of the 3PT blower..... you still have your loader available to help bust up any extremely hard packed snow if you absolutely couldn't get through it with your rear PTO blower. You'd do fine with the blower wide enough to cover your tracks with your setup!!
Now we need to get you set up with a wide, horizontal, non curved mirror mounted just above and in front of you for winter snow blowing duties!!