needle turn applique is a hand technique---easily done as a travel project- and many of us learned from books- there is also grandmother's flower gardens, tumbling blocks (english paper piecing) which is done by hand- visit paperpieces.com for ideas, supplies, instructions. cathedral windows is my travel hand project these days- or embroidery projects
there are many many hand projects- you could even put together a 15" quilt sandwich (or any size that appeals to you), draw a design on it and quilt yourself a whole cloth quilt- great practice hand quilting-and they generally turn out beautiful. the hand quilting project would be the easiest for prep & what all you need to carry- a tote with your hooped quilt, a spool of thread, needle small scissors & a thimble--little sewing kit- it's easy to pick up & lay down ---but so are applique & english paper piecing---just more prep work & a bit more to carry-since you have many pieces-but easily carried in a ziplock with your sewing kit.