What class are you thinking of competing in, Phil?
From what I’ve seen, get a trailer and an RV. A trip to Bonneville is an adventure in logistics. Besides, serious race vehicles always arrive on a trailer. Engineering is a collection of managed compromises and the trailer eases the compromises towards going fast.
As a prelude to Bonneville, some people now try the Texas Mile.
http://www.texasmile.net/ One-fifth scale Bonneville on pavement. Not quite the logistical nightmare of Bonneville.