If you are winterising you caravan for outdoor storage, then a cover for your caravan is a very good idea. If you are lucky enough to have indoor / undercover storage available, then it’s not quite such a worry, but if your caravan is standing outside it will be at the mercy of the elements. Wind, rain and frost can all damage your caravan, affecting the paintwork, just as UV light can cause fading. You need a cover which can protect from animal droppings and tree sap, moisture and ice, as well as general dirt. It also needs to be breathable to allow moisture caught inside to dissipate and not cause condensation and mould.
Inside storage can still be dusty, which can scratch your paintwork and cause corrosion, so even if you are using a storage facility, it is still worth looking at the conditions and finding a suitable cover to keep your caravan in tip top condition.
You can get ready made covers with soft, breathable insides, or, if you cannot find something in the right size, consider having something custom made. The extra cost will soon be balanced by the protection it offers an investment like a caravan or motorhome.