I think anywhere below ground level is good. Having a plan for when the weather radio goes off is the lifesaver. My shelter is 40 feet from front porch with solar lighting showing the way. Full battery powered led motion lights inside that will kick on instantly when door is opened.

If you ain't gonna fart, why eat the beans?
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RES,HBG,YP,HSB,SMB,CC,and FHM. .seasonal trout.