Should I use cruise control while towing a travel trailer

Depends on the rig, how heavy you are towing and what you are towing with. I don't use cruise when towing because I don't find it necessary. If I'm on hilly interstate with a target speed of 65 I'll let the rig roll downhill at 70 and slow to 60 on the uphill if I need to....the cruise will rev up the engine and sometimes command 2nd gear to hold the set speed. No need to work the truck that hard IMO.

Of course I have an old 4-speed auto trans...newer trucks, especially diesels have more gear choices and generally more power, so if I had a newer diesel, I would probably be using the cruise control.