OSH for sure! Consider flying in Sunday afternoon once the field re-opens after a thunderstorm. There will be hundreds of planes coming from every direction, holding at both lakes, guys garbaging up the radio asking unnecessary questions that can be answered in the NOTAM booklet, some guy in a Pietenpol flying opposite direction southwest along the railroad track, and surface wind will be 050/15G25. A warbird will cut you off on base, and then somewhere on TWY P just south of P1 you will taxi through water so deep that you'll get rusty wheel bearings, and your HBC sign will blow out when you open your canopy.
But...
You will have the unique satisfaction of landing on a colorful dot and taxiing off into the grass, and a man in a pink shirt will compliment you on your amazing flying skill--even if you don't deserve it. You will be be marshalled by well-trained volunteers, welcomed with a bottle of water and a high-five by the coolest guy you ever met on a moped, and your new neighbor will offer you anything in her cooler. You'll stand in thick Wisconsin grass, be immediately enveloped in the largest aviation community in the world, and then look up to see a MASH helicopter beating the air overhead. You will smile, start to relax, and then settle in for a few days knowing that you are within short walking distance of the greatest air show on earth.
You can do this! It's one of life's greatest aviation accomplishments. Go for it!