If you divert en route and end up parking on grass then give yourself a D for head work.

If you get diverted at OSH I believe there is a chapter that sells tie downs at FDL. Most people overlook going NW to Waupaca and head north to Appleton which is not really set up to support large numbers. The Cherokee guys use Waupaca as their staging point for their mass fly in. The FBO at Waupaca is EAA friendly and the town/county even runs a free shuttle bus into town and down to AV.