Nice quilt! That's a huge amount of work, and it turned out really well! I'm sure your friend will love it especially since you replicated her wedding colours.
Another option for blocking is steam blocking. I often do this.... You just set your iron on low so you don't melt the yarn, and you blast the project with steam. I give my project a little tug as I work on it so that the stitched relax and stretch out. I find that it helps my piece grow in size, especially if it's acrylic. Its a good idea to have a damp tea towel between the iron and the yarn so that it won't melt, and just to be safe I always iron on the back of the work.
Again, beautiful blanket!