Storage Bins, Rubbermaid, etc.

also beware of the raccoons! they have the lids, and the latches for most stuff already figured out!
Then.....there is the BEARS! Those lil critters will tear apart a soft container like cheese. And... like grass thru a goose make your life a mess.

Check out Costco and there 22 gallon black and yellow "construction" containers.... only 8 bucks and change. I have a few of the action packers and those a great but these are a GREAT deal.

That said, I would seriously think about adopting a backpacker mindset and reduce the amount of "stuff".

Those Costco containers do have slots along the sides for locks/cables.

We use two Rubbermaid action packers. I leave at least one of them out at the campground and have never had a problem with them walking off. You might put a bungee cord on the lids. I did have trouble with the lids fitting tight after a few years.

We use Lotz of totes. Measure your storage space then at the store set up and measure various sizes till you find a mix that will fit. Easy cheap and neat storage. If they walk away the most your out is maybe ten dollars