this is what has worked for friends...

you're going to need a layer or two of something besides plastic (or 3 when talking large amounts like that)...like after a couple layers of plastic put a layer of sudsy soap film over entire surface then more layers as needed. use a couple of those turkey roasting bags too...they are a much better grade of plastic that doesn't leak nearly as bad as most other plastic material...wash hands between EACH layer...especially the 1st couple. pack inside a wet vac (only 50 bucks and holds a lot) or similar. you know the rest...good luck...common sense rules