I have been driving often betweem Phoenix and El Paso, and it is hot and dry. Decided to do a trans fluid check, and saw what I knew was a big exposure. After 185,000 miles, and driving non-stop 380 miles in the desert heat, the hoses need to be replaced, and fast.
Good idea to replace both radiator hoses. If one failed the other might not be too far behind. At 185,000 miles you are on borrowed time. While you are at it, buy a new serpentine belt and throw it into the trunk. Its an easy roadside fix (with the right wrench of course) that could save you from being stranded.