I have done a couple "Patriotic" quilts a couple different ways....one I did with variegated thread, ended up too busy for my taste. Another the time I tried using only matching solid color thread in each 'portion', liked that, but was very time consuming to keep changing the colors. The last one I did with all invisible POLYESTER THREAD (from Superior) and like it the best because (IMHO) nothing was fighting the strong colors and design.
You are already 'done' with the quilt in your head, the more detail and pressure you put into this quilting is only going to make you hate this quilt that much more.
I would recommend using invisible thread, a walking foot and just go up and down all your seams ( just keep in mind the recommended distance of your batting)
Stop over thinking it and just keep it simple and sweet and not overdone......IMHO
