I have always done it this way like in the pictureI have the Sunncamp 260 but I'm not entirely sure what you mean by bottom flaps. Do you mean the folding sections at the bottom of each wall - usually called an external mud wall?
If so they should be pegged outside so that any rain coming off the roof and walls runs away from the awning. I'm not quite sure of the logic of pegging them inside but if it works for you why not.
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We peg through skirt first and then into ground sheet. Keeps ground sheet in place and down in wind.I'm also with Thingy, inside, pegged under the floor covering.
We have the Bolon and found that if we make a hole through it, the next time you use the Bolon the hole is not longer there. We also have the above to peg down the groundsheet.I would never peg through the groundsheet. We always use the Bolon Carpet, its too expensive to make holes in deliberately. What we do is use the Bolon grips, which attach to the edge of the Bolon carpet, and then peg the grips down.
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