IMHO hauling in a dump trailer is less than optimum.
it's up MUCH higher, you'll really notice how high up your load is. It also makes it harder to load (steep!)
your whole tractor has to fit inside and the hydraulics have to lie flat (FEL, backhoe, whatever). (although if you have a gooseneck, you can lie the FEL on the gooseneck part and secure it)
it's a PITA to secure, it's not easy to work around the tractor and the walls and work the chains/straps.
Dumps are really useful trailers, if you need it a lot, most people don't and would do better with a equipment trailer.