600 miles one way? Yes and no. It all depends on if you consider trailering a no-brainer or PITA. There are a ton of ORV trails you can ride and some spectacular views. Drummond Island is VERY scenic with some very nice shale beaches. (drive in the water = ticket). There is an ORV park called Turtle Ridge on the island with some pretty good rock areas with mud and moss on them. Not really something I would recommend on your own.
Bottom line, I would think that if you have never been there, it's worth the tow. My guess is if you have time to kill, you will regret NOT taking the sxs.
Below is a pic of a sunrise on Marblehead. (eastern most point of the UP) We left camp at 4:00am and rode to be on the point before the sun peaked up.