Johns right on the $ with putting the front flap down.The cover if not attached good to the ground will turn into a kite on a winndy day.I used to tie my boat to the cover.But I went out and bought swing set anchors that twist into the ground and I don't have to worry about windy days anymore they are very strong.I dug down 8 to 10 inch then twisted them in and they won't move now.I think the Cover It shelters sell them for $5.00 pc.well worth the $$.
I used the spikes and they pulled out Cement would be better than my anchors but the anchors would do for this year if you don't get the cement done in time.I saw one today also that looks so much better than the one I got now.