Along with the Minnesota State Parks there are many private campgrounds in Minnesota, with more amenities than you can think of.  Many of these private campgrounds have seasonal sites as well as daily, weekly and monthly rentals. Usually these sites cost more than your State Park sites, but provide a more personalized visit.  They seem to cater more to the family experience with pools, activities and themed get-togethers for campers who want to share the experience with neighboring campers.  They also have more sites that provide electricity, water and sometimes even sewer hook-ups.  It’s a great way to go if you are not opposed to closer campsites and less of the “true nature” experience.