The Mineral King Hwy has over 400 curves and some places are only one lane wide. Doable in an RV but Atwell Mill is not a level RV campground. Cold Springs Campground is further up, near the MK Valley and has a couple spots that can handle an RV. Dogs are not allowed on ANY trails and must be leashed at all times. Dogs tend to bark so you'd not have much chance of observing deer browsing, or grouse. It's also bear country and all food and anything scented must be secured in the bear box. This is so they don't become problem bears. Recommend wearing a whistle so you can scare 'em off, in addition to your dogs. Actually, leave the dogs home. They won't have fun. You can't leave them tied in your campsite or locked in the RV without an adult present at all times.
They do allow dogs but only in the camp sites and not in any of the wilderness areas. Dogs must be on a leash and accompanied the whole time.
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