Mark, trailers in Minnesota are 8' max. Farm exemption, a farm implement can be 10' with no problem. Fruther, a farm implement going under 30 mph and properly marked can be wider, just not cross the centerline.
So, you can tow a wide baler or haybine without worries in Minnesota. However, if you put it on a trailer, you hit the 8' width rule!!!! Different states have different rules. You can move farm equip up to 20' here if you have a lead pickup with flashers on.
As you say, probably get away with it. On the other hand, you get involved in an accident, and then what? Your insurance doesn't cover because you weren't legal, sue because they got hurt - and you are in a world of hurt too. I sure would not pick a holiday weekend with a lot of big campers on the road in inexperienced hands - ouch!
If it were me, i'd arange a heavy loader at the other end, place the baler on the trailer at an angle, & take the chute/ hitch/ etc. off until it fit. It will fit at an angle, but very difficult to 'roll' it to that postion. Once you got it home, you have time to figure out how you want to get it off.... I'd go there Saturday & get loaded, come back Sunday (not a holiday weekend) and leave early, best travel time with such stuff.
I know this is an older message, wonder how it turned out?
--->Paul