Hi all,
Thanks for your thoughts and tips above. I decided to tackle this sewing project. It was more effort that I hoped for but its done now and I hope it helps if/when we encounter no-see-ums. We've mostly experienced them in Utah, Outer Banks NC, and various places in Idaho.
I purchased the no-see-um netting online. It is a very fine mesh and I hope it lets enough cool air through in the hot weather. The netting is quite slick/slippery to work with. Cutting it was difficult but I basically cut it close to size then trimmed it down more later.
Since we have a dog or two, I put the fuzzy side of the stick-on velcro in the camper (so less dog hair will stay stuck on it). I used the hook or rough side of the sew-on velcro to attach to the removeable no-see-um netting.
Since my sewing machine didn't want to play nice with no-see-um netting and velcro I sought help at the sewing store. They suggested a ribbon-type fabric, then a strip of wonder tape to hold it in place, then the no-see-um netting, then the velcro and sew it all together. Once I got the tension right, it worked wonderfully.
For the 4 windows on the soft-sided canvas/pop-up area, I didn't need any stick-on velcro since the windows already have one side of velcro. I just used sew-on of the type to stick to that.
The stick-on velcro didn't want to stay on the fan area too well so I enhanced the stick-on adhesive with Barge Cement.
The screen door was done in 3 pieces since the middle section has the slider to open the latch. On the screen door, I put the no-see-um netting on the outside.
Some pieces of the no-see-um have velcro on 2 edges (wheel well sliders, back slider window), some have velcro on 3 edges (4 pop-up windows), and some 4 edges (fan, screen door). The screen door ones could have had less but I originally had some of them on the inside, I later switched them to the outside but left the extra velcro in place even though its not sticking to anything.
Hope this is helpful to others. I'm just happy to have it done.
Joanie