I'm not an expert (and thankful for postings by those that are), but if no significant winds are forecast, I sometimes put a couple stabilizing lines just to minimize the flapping of the awning arms in light breezes. However, to avoid a sudden gust leaving the tie-down secure and the awning ripped off the coach (how's that for a backwards outcome?), I use (1) just a tent stake as the attachment point, (2) light nylon line, and (3) just a taut-line hitch on the tie-down. It's never been tested, but I hope in that configuration the tie-down would give first.