on sand, a short stick / branch / limb / driftwood tied off and buried out a few feet and down a foot works well. size and depth of anchor depends on wind speed expected. can also use two anchors at each corner as previously described, if you want a really, really good night's sleep. smile
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“Everyone should have a horse. It is a great way to store meat without refrigeration. Just don’t ever get on one.”
- ponder's dad