Don't worry about the drums, heck, I drove my truck from Texas to Alberta with the current drum/drum setup.
As stated above, make sure you have spare gas, water, belt, etc.
And with a little luck you will make it. Might want to have the credit card available just in case too. :p
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1970 Chevy C20 Custom Camper
402BB Turbo 400 trans. (Slowly becoming a '70 shortbox 1/2 ton)
'71 Camaro SS 402/T400 resto
'97 Z28 (11.41@127MPH)