Welcome to the board from North Central PA.
So sorry to hear of your loss. {{{HUGS}}}
Many folks on the board have made memory quilts so I am sure you will be getting lots of help. I haven't made any, but I have used Printed Treasures Sew In fabric sheets to incorporate pics into my quilts and they have worked well, just a little difficult getting the paper off at times. Someone posted on the board that you just reheated the fabric with a warm iron and it solved the problem. I got Printed Treasures (in the green package I think) at Joanns and used my coupon because they are a little pricey.
Once again, welcome and please let us see pics of your quilt when finished.