The site you're referring to is easy enough to find, but I haven't been there. To my knowledge, it's in the Gazetteer. I always have one with me, and it's damn accurate. It's by far the best comprehensive map of trails for Michigan.
I think I have some gps tracks that could help you, but then again, the Gazetteer will tell you the same info. If the SAM site isn't in the Gazetteer, a quick Google search will surely find it as it's a fairly common site to see.
As for Drummond Island, it's a great place and was even voted one of BFGs best trails last year. However, it's also a long drive to get there from where you're planning on going. The ORV sticker is a possibility depending on where you go. ORV stickers are needed on ORV Routes and scramble areas only. Most ORV routes are also designated forest roads, but some are not. Drummond Island is a good example of this. Some of it is forest roads, but other parts (the 4x4 challenge areas specifically) are Route only and a sticker is needed. Basically, if you go to Drummond, get a sticker. The rest of the UP trails that we've discussed are forest roads and don't require one. They only require your vehicle to be licensed and insured. If you choose to get one, they can be purchased at any sporting goods area for $16.25.
Back to the area you're asking about, I'd personally choose to run more of the Porcupine mountains and up into the Kewanaw. There is enough exploring to do and waterfalls and such to see that you'll easily be busy for weeks if you wanted.
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