Refreshment stops to Cornwall

Hi we are new to all this and bamboozled by the weights on matching we have none read. We are considering buying the new Sprite Major 4 but are wonderingof our Astra exclusive 1.7 CDi (2012) will comfortably tow this van which is on the lighter side and which the blurb say can be towed by the average family saloon.

Any help much appreciated