Land of the free is not so free
No, at this point in the (legal) timeline. If you do it in the land of the free the "hackfest product" cannot be exported to Europe, Japan, Korea or elsewhere without a license. So you are stuffed in a very similar manner.
The only way to do it is to host it in neutral waters on a ship registered to a country which does not participate in Wassenaar and could not give a damn about software "weapon" exports. In fact any cruise ship registered in the Bahamas, LatAm, Africa, etc is a fair game. If it is outside the main tourist season it will also end up cheaper than doing it in let's say Japan.
Sad but true - we have reached a point where we cannot have an international security hackfest or conference in any Western European country, USA, Korea, Japan, Australia or New Zealand.