Front Hitch Extender & Pin Questions

[Sundown94]

Hi Everyone!
I am going on a fishing trip and want to attach a cooler rack (a rack that holders an Igloo or Coleman food/beverage cooler) to the front hitch. I just ordered the hitch extender (part #:12498329) but need the appropriate "vertical" pin to hold the extender in the receiver. Does anyone know of a good pin that also locks so nobody can steal the rack? Also, can the front hitch withstand the bouncing of a heavy cooler for during a 200 mile trip? I would imagine that it can since it has similar capacity to that of a standard rear receiver. Thanks a million!