Being a native from MN I can tell you most people camp at a State Park or a Private campground, all which require a fee. The National Forests are so far north most Minnesotans don't know what dispersed camping is. They just do not frequent that area as it is so remote as there are 9,000 lakes a lot closer to them. The National Forests are run by the US Government, not the state of Minnesota. Almost every state park across this country is strict, including my current state of Arizona. We do a lot of dispersed camping here on the National Forests in AZ and CO, in a class A I might add, we love the remoteness and the fact that camping is free. Unfortunately I have not camped in a MN national forest (yet). Based on what I have read on the website you should have no issues. My only concern would be the roads to the dispersed camping sites but it sounds like you have a pretty good setup. Now, hopefully there will be no bugs when you get there.