I've used cotton duck, sunbrella and ballistic nylon for various projects, depending on UV exposure, resistance to friction needed, color choices, etc. They all sew easily with a denim needle. 

Thank you both! We bought a good quantity of sunbrella for the bags and cover, so I'm committed to doing it the hard way. If I fail miserably, Colie Sails looks like a great alternative-- thanks!

   Try Sailrite.com, lot's of really good info and diy videos.  If not on their site, give them a call, good, helpful people. 

Nice! I get their catalogs, but had no idea they had so much DIY info posted. Thanks!