Modifying a quilt – question

No reason I can think of not to do it! I would do a fairly short stitch, but will defer to others for exact length.

I've wanted to do the same thing MANY times, but just never did it. Gravity always wins!

Well, Enlightened Equipment gives gravity a run for its money with the longitudinal baffles. Made me happy.

I had a lot of seams come together on a sleeping bag I made.
It was on top rubbing on my forehead.
You can see how everything comes together at the top.

I decided to sew a piece of fleece to it and love how it worked out.

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that would be easy to do. Maybe just make a small loop and tie it with a square knot. Maybe three such stitches per baffle.

Sure you don't have access to a machine? That would be easy to do. Don't have to worry if the seam is weak for any reason.

maybe with down, you should just shake the down towards the top. Once every few days. You should do this anyway to fluff up the down.