looking at the surf to summit 42" bag
http://www.kayakfishingsupplies.com/...ag-from/Detail
and the yakcatch precisionpak bags
http://www.ebay.com/itm/Kayak-Sea-Fi...item2a2cdcba0d
anyone have experience with either? pros and cons to zipper vs velcro? zippers rust and velcro gets sanded easily..?