Tucson AZ to Rapid City SD

"Looking for suggestions on a route from Tucson to Rapid City SD."

From Tucson go east on I10 all the way to I25, then north on I25 all the way to Wy, where you cut over into SD on 20 & 18.

"Will have stops in Winslow, AZ, Cortez & Fruita CO."

Weather varies each year, but early April is a bit risky taking any of the mountain routes in CO. You didn't say how you plan to get from Cortez to Fruita, but places like Lizzard Head Pass on 145 and Red Mountain Pass on 550 will usually still be buried in snow in early April. Any of the high passes in Co could get 3 ft of snow overnight in early April. Assuming you get to Fruita, I would head east on 70 all the way to Denver and north on I25 to Wy to the same cut over into SD. You still may experience snow on I70 at Vail pass in April but the interstate gets cleaned up faster than the secondary roads.

Merlot wrote:
Looking for suggestions on a route from Tucson to Rapid City SD. Will have stops in Winslow, AZ, Cortez & Fruita CO. After that I'm open to all suggestions. I am towing a 37 foot fifth wheel. Travel time early to mid April.

There all good roads and we need to see all of them while we are here.