Tarp on Alone

Go straight to the size limit. The only tarp on a winning list, the Baird brothers' in season 4, measured exactly the twelve by twelve foot maximum the rules allow, and among the eleven documented carriers across five seasons and one spinoff, everyone who undersized, doubled up, or improvised with sheeting finished second through tenth. Eleven data points is a thin sample, but they all lean the same direction: nobody has regretted bringing the biggest roof the show permits.

Material is the real fork, because the record's tarps run from a translucent plastic drop cloth to Callie North's hand sewn military weight canvas, and those are different strategies wearing one name. Thin sheeting is a featherweight rain layer over a debris shelter that will not survive months of wind and sun; the heavy end is a semi permanent roof that costs real weight and bulk. The unbranded middle of the record, and the catalog's own example, points at woven ripstop as the compromise the field actually converges on.

Our buy is a full twelve by twelve in heavy duty ripstop with reinforced tie outs on every edge and corner, because tie outs, not fabric, are where tarps die under snow load, and a torn corner in month two cannot be sent back. Go lighter only if your shelter plan treats the tarp as a temporary layer while you build the real roof from timber and debris, the one strategy where the drop cloth approach has a documented deep run behind it.