From Cross City a lot of the traffic will be much bigger than any legal length RV. Overlength logging trucks, double bottom dumps coming out of the limestone quarries. No problems with road widths, turns, etc. You must slow down for the towns.
I usually pick up 98 at St Marks or Perry, going to Crystal River or Brooksville. Most of the route is four-lane divided, and it is the main commercial trucking route for the northwest and west central Florida. Haven't taken it through to Pensacola since 2004.
US-19, going south from where 98 splits, is another story. Though the road remains good, traffic gets horrible, with respect to both amount and driver quality.
Tom Test
Itasca Spirit 29B