Weight is your friend at Bonneville, be sure to bring along some bolt on ballast. Ballast = Traction
The numbers I gave you were for our partially streamlined bike. Bounce the forks rider mounted, leave yourself about an inch of clearance. The best bet is have a little adjustability, if the salt is bad you may need more clearance than when it is perfect. You can let a little or a lot of fork stick our of the tree.