Definitely invest in the walking foot! I can't believe I sewed for so many years without it. Now that I have it, I could never quilt without it! I also use it on other projects, such as purses and wallets. It makes all the difference in the world to me!
I spray baste mine too. It helps a lot. I still end up with a few "kisses" as someone called them, but very few. I also find it easier to "scrunch" up my quilt, rather than roll it. I seem to be able to maneuver it better to where I want it to go.
:)