I'm putting in my 2 cents worth in favor of the Dutchman flaking system recommended by Mort above. I first sailed with one on a 28 Catalina at our sailing school and fell in love with it. When we bought our current boat, Papillon, an E35-II, it came with a lazy jack system that gathered the main on top of the boom. It worked and we would simply flake the sail at the dock or in the anchorage before putting the cover back on. It did have its downsides though. It would catch the battens from our full batten main when raising the sail so we created a way to un-deploy it (???, lower it and harden the lines to the mast with a cleat, while leaving the lines running up the mast). This would allow us to raise the sail with no problem, but, when we went to lower the sail, we had to go and deploy the lazy jacks again. When at anchor or at the dock, the lines lashed to the mast would rattle to beat the band and we had to bungee them to keep them quiet. Last spring we ordered a new main from Quantum and we opted to have them install a Dutchman system at the loft so we could ditch the lazy jacks. Cost was $700 CDN or about an additional 20% over the cost of the main itself. The result was fantastic. I will never buy a mainsail again without having the Dutchman system installed. It is so simple and works so well, it makes using the main a treat not a chore. We are much more inclined to raise the sail and therefore sail more often because we are less intimidated by the prospect of lowering it. Once set up, there is nothing to do apart from heading up and releasing the main halyard. As the sail comes down the system neatly flakes it over the boom. When you pull into the anchorage your peers will be impressed at all the effort you put in to the care and feeding of your nice, new sail! It doesn't interfere with sail shape or sailing at all, in fact you forget that it's installed until you go to lower the main.
BTW, I took about 4 times the weight of the Dutchman off the boat when I removed the lines, blocks and fittings for the lazy jacks so it was a win - win.
One last recommendation is to go with a loose-footed main (see other discussions on this point elsewhere on the site). You won't be sorry!
I'll look and see if I have pics of the install for another post.