If I am doing a large quilt, I go to our local senior center (not at a meal time), shove 2-3 tables together, tape down my well starched backing, with a friend, "float" the batting into place, then the well starched flimsy. I pin like crazy. When I have one table worth of quilt pin basted, I remove that table.
What I don't do: no spray basting as it triggers my asthma, even out of doors. I have spinal arthritis, so I only use pins I can pick up with a magnet, ergo, no curved pins. JHittle has a great telescoping magnet. I was dissatisfied with a tack gun, as every point that was tacked could wobble a bit. Also, I tended to jam the gun, although DH did not. I don't use iron on bats for bed quilts because I don't care for the texture, but they are great IMHO for wallhangings etc. Obviously, these are statements that are very personal to me and none of them may apply to you. The bottom line is that you will meed to find what works really well for you.