Marty,
As you well know, equipment trailers are a whole different animal. Longer tongues, axles set farther to the rear, and complete control over where the weight is placed. RV trailers have short tongues, axles set almost dead center, and very little control over the balance.
Not only that but I sincerely doubt you were using underrated receivers, shanks, or balls to tow your equipment trailer around on a daily basis. Especially since it sounds like you are a commercial operation, and as such subject to DOT inspections.
The weights themselves are not a problem. The truck itself is capable of towing those weights day in and day out for its entire life. HOWEVER, it is not properly equipped to do it day in and day out. It needs a heavier receiver, shank, and ball to do it without weight distribution.
For a one-time tow of 35 miles, the OP *SHOULD* be okay, but I wouldn't exactly "yawn" at it.
