i'm not a talented quilter, but this is what i do:
i use heavyweight striped ticking, like what they sell at
http://www.baysidequilting.com
i attach it to the poles with velcro. i leave them at about 18" at the top and 12" at the bottom. the 18" at the top lets me pin without bending too much. you can adjust this length so that you can pull it towards you as much as you need to. the 12" at my body lets me do the same. i priced out the zippers at bayside, which has good prices and i nearly fainted. maybe you can find a better price somewhere. once or twice, when i had enough extra backing at the top edge, i basted the top edge right to the leader with the machine. that edge must be very straight to do that. so ...
i pin the top edge of the backing to the leader, carefully roll it all up, smoothing it out as i go, until it reaches the place to attach the other end to the other leader. here also, if it's very straight, you can sew right across with basting stitches, if you have enough extra fabric. roll backwards, back to the top.
now, i attach the batting at the top edge only. i used to roll it, but it's much easier to float it. if it starts stretching or getting wonky, you can adjust it if it's floating. this i always machine baste. lastly, when i lay on the top, i pin very carefully within the 1/4" allowance. when i try to machine baste, i can't keep it outside the imaginary line. i roll my tops, not float them. i like to keep them evenly firm because the batting is floating.
if the pinning is hard on your back, make the leaders long enough to work with them while you sit. i've also used those tack guns and they work okay. i wouldn't buy them for this purpose, but i had one.
one problem i do have is that my fame is 120" and the quilts are over 100" on the frame, when you add the extra inches on the sides. that means that the machine is always lifting part of the leader. so it's hard to get a straight line when pinning. i should have used longer poles, maybe 140". then i could slide the machine all the way over to one end.
my leaders are marked with stripes, making it easier to see what i'm pinning or sewing. i also mark the centers, then mark the centers on the quilts.
i hope this helps.