Well I am getting ready to take my KR on her first road trip. I have had her since Feb '11. Only been town driving with it. No more than like 20 mi at a time. Heading from NE to IL. Little over 430miles. Anything I should keep my eye on? (truck wise) What is everyone getting for highway miles? I have a 02 KR 4x4 5.4. With soft bed cover.

p.s. Not towing. just misc. stuff in the bed.