Towing Advice - good DVD's or you tube vids

Hi Everyone,

Me and my wife have been caravanning for about 4 years with a tiny 10ft Silverline Silvercrest. Up until now I have done most of the towing with my wife having a go on the large roads/motorways on two occasions only. We have really enjoyed the caravanning, giving us plenty of opportunity to get out scuba diving and walking. As a result we have decided to invest in a new caravan (4 berth so that we can leave the bed up) but unfortunately I have had an operation on my knee meaning that my wife will have to tow the caravan. She is very nervous about this as the caravan is double the size of our old one and there is no easy route from the sales yard.

What I would like to know, are there any DVD's or you tube videos that anyone could recomend that may help my wife feel more confident as the driver. We did look at booking her on the club courses but by the time the courses are run she will have done several trips with the caravan.