Take your CAR, RADIO and BATTERIES on in a carry on bag. This way if anything happens to your luggage you can borrow everything else at the track... Hard to race without Radio,car and Batts.
Goto Walmart and get you one of these:
http://www.walmart.com/catalog/produ...uct_id=2476189
They are in the automotive area and are only like $30
Pack Charger, power supply,soldering iron and such in that.
Check that just as you would your regualr ole luggage.