Can you get hold of any of these? (Sorry, but Ebay was the quickest place for me to find what I was looking for!) link
These large zipper plastic bags hold a lot of stuff! They are great for storage. I am guessing you don’t want to use boxes because you can’t “stuff” a box into a corner, etc. So, put your breakables/valuables into a box and use the storage in the van for those things and bags for the rest. You can get these large plastic bags at a lot of ethnic shops (Chinese, Mexican…and surplus shops or I think you call them Dollar Stores in the US?) They aren’t expensive. Use each one for different things…one for blouses, one for sweaters, one for trousers, etc. Then use others for papers and smaller ones for whatever else. They come in all sizes.
Another option? Get space bags to scrunch your clothing into a small space. You can find space bags that you roll to get rid of the air (rather than use a vaccum).
Then, grab some packing tape and make a label and use a Magic Marker and mark the packing tape and then slap it on the side of each bag so you know what is in there.
(Do you have a lot of stuff, Fluffy? What sort of stuff are you packing to take?)