I have done log cabine with foundations and also just sewing the fabrics as the l.cabin calls for it. I didn't know you could do the latter until a friend who taught Home Ec. at the college taught me.
Just line up the fabric strips in the legnths you need and colors you want, and sew away. It works for me!
I have made 4 log cabins--2 quilts, 2 wall hangings, and I found it is quicker this way for me.
Have never done it paper piecing, but to each his own.
Good luck!
Mariah.