If a blanket then you would need to keep it off delicate branches, but fleece I just drape over. It needs to be pegged as the slightest wind it will lift off.
At the moment my Acers are still tight buds so they should be ok, but the Tridents are open so I put them in the shed. My Larch are almost all in full but I can only cover with fleece as I do not have enough space in the shed.
What part of Fife, we stayed in Culross for a couple of days many years ago now, we used to go to the Trossachs area for a week each June, did it for about 10 years, we hired a caravan on a farm,