I'm still on a roll with this taquete warp, and learning a lot.
For the second towel (which I just finished weaving), I decided for the body of the towel to stick with taquete rather than summer and winter. the weft is 3/2 cotton, and I just wove a 4 pick sequence of
1 + 3->8 down
2 + 3->8 down
On a regular jack loom, this is equivalent to
2 + 3->8 up
1 + 3->8 up
Very easy to treadle, and so very comfortable to weave, all with the same weft, and I like the fabric texture that resulted.