cfarrinford

Hi,
I am about to make my first quilt and had a couple of questions. I am not doing a patchwork quilt, I am planning on having one piece of fabric on the front, one on the back, with bias binding around the end with polyester wadding in the middle

1. I was planning on using polyester wadding, will I need to change any setting on my sewing machine, like the tension, in order to be able to sew through this?
2. Should I pre wash the polyester wadding?
3. I am going to sew straight lines through, to hold it together, how far apart should these lines be?
4. Do I need to use the baste spray to hold it all together or is pinning better?

Anything else I haven't thought of?
P.S. This is for baby play mat so will be washed lots