Louie,
I drive that route every year (for more than 20 years). With the exception of a few antique shops in Roseville and Reno, there is very little to see / inspect along the way to Salt Lake (as it applies to collectibles). I would recommend stopping at "The Griddle" in Winnemucca (on Business 80) for breakfast or lunch. Great little diner with good food / prices / service. Its a 12 hour drive to Salt Lake, so bring plenty of granola bars and water. Keep in mind too that gas is not available at every stop (sometimes more than 50 miles between stations). Safe to cruise at 80 / 85 through most of Nevada / Utah, except construction / speed zones. You might check in with Brian Parker on shops in Salt Lake, but Brian being very diligent has probably plucked all of the shops clean of Zeenuts and E-121's
, so you might have to settle for Bowmans and early 80's Fleer cards....