I have the original GG Crown VC 60 and love that pack....but I had the same issue. I could sometimes reach back and grab the Smart Water bottles but found it difficult to return them to the mesh pockets. I got tired of asking my hiking buddies to put my water bottles back into my pack for me. Then someone on White Blaze suggested the Blue Desert SmarTube Hydration System. I purchased one last year from Amazon and Icouldn't be happier with it! There are several caps included that fit different size water bottles - including the Smart Water bottles many hikers prefer. I simply attach the tube to the bottle, slip the bottle into the mesh pocket, loop the hose over the top of my shoulder and I'm good to go! I use a small strip of Velcro to hold the tubing in place on my pack strap and the mouthpiece stays within easy reach. I purchased a different bite valve for it - and Amazon doesn't carry that particular one now - but other options are available.
Believe me, you will enjoy this system.