Here's how progress has gone so far:
I chain pieced every triangle to another one, just so there was a more manageable number of units to work with in the layout.
Next I laid out the rows. It's hard to keep it random and my natural instinct was to create patterns. The quilt is also so big I've laid it out in two parts, so the first time I see the whole thing together will be when I baste it. This is partly because I'm really struggling to keep this away from my husband. Every time I need the big picture, he's in the house and probably in the room most suitable for spreading out!
I sewed the triangle units into rows and then sewed the rows together.
I bought extra wide backing fabric and some queen sized wadding to baste this weekend, so this morning's job is to sew the last three rows together and BASTE! I'm torn between straight line quilting and stippling - any thoughts?