I've had fancier machines but my favorite remains my vintage Singer Featherweight. It is a workhorse of a machine. It basically sews straight stitch only. With some attachments it can sew zig-zag and it can sew buttonholes and circles. While not as
light as its name might indicate it is compact and comes in a sturdy carrying box. I do not, yet, sew while on the road because I am an avid hiker and tend to be too tired for sewing at the end of the day and I prefer to sew by daylight. If I were to sew on the road I would take my Featherweight in its carrying case and I would put some of my materials and tools in drawstring bags right there in the case. Pressing with an iron is integral to quality sewing. I'm not sure what kind of iron I would bring. For quilting projects this might be the ticket
Prym Dritz Petite Press Portable Iron at Joann.com. It would be a real treat to sew outdoors. I think I might use cans of food to act as weights to keep projects from blowing away. You know, an ironing board might be a good sewing table as it has adjustable heights AND can be used for ironing. (It might be a little tipsy though) Perhaps a table like this would be good for sewing
SB 30" Personal Folding Table | Staples®. It is only 26 inches high, though. You could place an ironing pad on the top
Fons & Porter Portable Ironing Pad at Joann.com (be careful because the top is made of plastic).
As you can see by my attached photos I love to sew accessories with themes for our trailer "glamping" experience.