Not bad, I was actually over 19 by the time I hit Phoenix, coming from Omaha.

I had a 12 ft utility trailer with around 800 lbs of stuff in it, trailer weight roughly 400 lbs.

It should be noted that I decided to take my time on this run, so stuck the needle between 65-67 MPH and just left it there as much as possible.

Saved me $100 in gas, each way, from my previous all out go go go as fast as possible the year before.

 

I was able to average between 18 - 19 round trip from Phoenix to the Sacramento area.

No trailer, going 70-75 where it was legal.

Good mileage for you with a utility trailer.

 

Just as an addendum, here's the whole rig as it went down. Came back with just a few items.