Hi Robin:
I looked at your gallery of quilts...very nice! There is good information out there for blocking quilts...Ricky has a video, Karen McTavish covers it in her books & DVDs too. It seems that every quilter has his or her own technique. Some soak, some steam, some spritz. Some pin to carpet or insulation board...Ann Fahl pins into those cardboard cutting surfaces sold at fabric stores...she sometimes pushes four together. Some block before binding, some after. Sharon Schamber blocks each BLOCK and every step along the way!!!
YOUR difficulty will be blocking the FINISHED quilt...will the fabrics withstand steam or spritz? More importantly, will the embellishments allow you to manipulate the quilt enough to square it? You'll just have to do a little homework & give it your best shot. And for wall quilts or show quilts in the future, I recommend quilting, blocking, squaring, binding & embellishing in that order. Good luck to you!