What are folks using for a tie down system when in the backcountry? I've read a couple threads on this over on the Super Cub forum, but was wondering what the members here prefer. I looked at this option based on what I read over there, ( http://www.flyties.com/ ) but I'm not convinced this would be ideal on gravel bars/rocky soil. I've also read about canvas bags that one simply fills with rocks and then buries. Other options? Some folks have also mentioned ground anchors, but I'm not entirely clear on specifically what they're referring to. I'm hoping to do some multi-day trips this summer where I'd be leaving the plane unattended for quite some time, so I'd like to have some confidence in whatever system I carry.
On that note, does anyone bother with a bear fence around the plane to keep curious bears away from chewing on the tires? I'm thinking that might be a wise choice, but don't have one yet.