Having read about the importance of not leaving the caravan in the same position for months on end because of the effect it has on the tyres, I have just bought an Alko side lift jack and brackets, so that I can jack the caravan up myself and put winter wheels on instead of the tyres.Reading the instructions, the caravan has to be hitched up to the towcar whilst using the jack. Because of the location of the caravan (nose facing house wall), there is no way I could put the winter wheels on with the van hitched to the car.has anyone out there got experience of using one of these jacks without being hitched up? our caravan has a single axle. Obviously I would ensure the caravan brake is engaged and would chock the wheels. The ground is level.i would appreciate any comments. Thanks.