Is bubble wrap any use on an aquaroll in winter

On the winter caravanning tips, it suggests using an old cylinder jacket to protect the acquaroll from freezing.  Funnily enough, I don't have an old cylinder jacket.  I do have a couple of rolls of bubble wrap though.  Would this suffice, wrapped around the aquaroll and pipes, and maybe the wastemaster too, to prevent freezing during cold weather?  We're going for our first winter trip away next week, and don't want to freeze up!   And another thing - antifreeze in the toilet cassette.  Has anyone tried this?  I'd not considered that the toilet flush and cassette might freeze up as they are inside the van (albeit separated from the outside by a few mm of caravan wall !)  Any advice gratefully received.