You have no worries, your truck can burn the diesel sold now and the new fuel that is available in parts of the country. It is diesel engines produced AFTER Jan. 1st 2007 that are limited to the new fuel.
I would not think that an additional filter would be required for a 600 mile trip, but an EXTRA one would not be a bad idea. You never know when you might pick up water or some other garbage. The worst time I picked up water was from a Texaco station in OK.