Overthinking...

I've pin-basted AND spray basted this quilt sandwich, but I still
haven't started quilting it!
A)I really struggled with the quilting design, but I think I've
settled on meandering diagonal lines.
B) how to quilt it. Should I do it by hand? It's REALLY big
(california King, 112ish" x 112ish"), so manouvering it through my
machine is going to be tricky
C) the bean likes it just the way it is on the bed (safety pins 'n'
all!). It's the perfect location for her to sit and shred a magazine
while I ponder quilting designs.