As long as the max vertical load at the tow hitch is around 75Kgs you should have no problems. That is the recommended VX load.
http://homepage.ntlworld.com/andrew.reynolds983/Manuals/Omega2002Manual.pdfPage 171, middle column, top paragraph
The caravan max is usually around 100Kg (Alko chassis) and the towbar itself around 150 (witter)
Many people have no idea what their noseweight is and so overload the suspension and back axle. You should aim for 75 Kgs with a miggy .. ok landrovers can go much higher .. but you ain't got one of them !!
Nose weight can be checked with bathroom scales quite easily ... 2 ways .....
Accurate one .. piece of broom handle cut to length to make the van sit level, place one end in hitch, the other on a piece of load spreader on the scales, raise the front steadies until just clear. slowly wind the jockey wheel up until the whole weight is on the scales .. read the nose weight.
Less accurate, stick the scales under the jockey wheel, raise the rear steadies slightly, wind the jockey wheel down until the front steadies are clear. Read the weight. This is NOT the nose weight as the jockey wheel sits slightly closer to the axle than the hitch, the true noseweight will be a little HIGHER than this reading, but it can be used as a guide. If this reading is over the limit .. then your true weight is definitly over !!!
HTH