I have a 38' fifth wheel with 3 slides and a 6-point leveling system. My question is, should I put slides out and then level or level first then slides?
Consider that extending the slides when not level you will have some frame flexing and will be attempting to move a square box (slide) out of a potentially not square opening (trailer) and can have binding and possibly dislodge slide seals. Personally I would always level first.