I made a full size quilt out of PrimaLoft, which is similar. I sewed around the sides and put quilting loops in and have not had an issue with the fill moving in 3 or 4 years. I sewed it on three sides by laying the top cover, then the bottom cover, then the insulation on top of each other and sewing through all of them. Then I turned the whole thing right side out and sewed the remaining side. Somehow I sewed the 3 sides where there was no insulation showing when it was turned right side out.
To put in quilting loops, use a cardboard template - a piece that is as tall as the fully lofted quilt. Say you use three layers of 1/2" batting for a total thickness of 1 1/2". Cut a cardboard piece about four inches by 1 1/2". Using a large needle, run the yarn through the top cover (or reverse to the bottom if you want the tied knots to be on the "inside" of the quilt), through the insulation and out the bottom cover. Then move over slightly (1/16 or 1/8") and come back up through it all. Put the cardboard template between the two ends of the yarn with the 1 1/2" side perpendicular to the quilt (think __l__ where the part sticking up is the 1 1/2" high template and the yarn is not shown). Now push the cardboard down, fully compressing the insulation and tie the yarn together on top of the cardboard. Remove the cardboard and let the insulation loft back up. Repeat a bunch of times.
Hope this is helpful.