Beach King, there is also a privately owned airstrip at Mt Ive Station, which is closer to where the racing happens than Wudinna. Quite good shearer's quarters accomm, BYO tucker (from memory). Bookings for accommodation and landing are essential.
Again, you'd probably need to get your mate to pick you up.
MostlyTossas - I agree with you that the Wudinna Airstrip is nowhere near the Iron Knob pub. Wudinna is about 100nm West of Whyalla, which is close to Iron Knob.