We've plenty of mice and raccoons in California, which love to chew packs, tents, and climb down bag hangs, but those Marmots--especially in particular areas--can be brutal to cars parked at trail heads. In one area (Mineral King) for example, it is not uncommon for folks to wrap their cars in chicken wire to prevent the marmots from climbing up into the engine area and chewing hoses, cables, etc. Raising the hood is said to help, too, as the marmots prefer dark places.