You can always combine a large dry bad (they come in an enormous range of sizes with an inner, non waterproof rigid container that shields from bumps and scrapes.

I am puzzled...If you can load up a car, why not simply take these items with you? In my recent bug out experience, we made conscious decisions to leave behind some monetarily valuable, but non sentimental items behind (tools, TVs, books [not all], clothing) that could be replaced, and maybe even upgraded. Of course, it all does come down to how much swag you intend to take with you....