I'm not that keen on blinds in a camper trailer. They can be noisy- a trailer moves (even when parked). They collect dust (of which there is a lot when you're out camping). And they are more easily damaged when you bump into them in the close quarters of a small trailer.
I managed to score some nicer lined curtains through a very generous member here who was redecorating.
Here are a couple of ideas I have run across and found very appealing, though I haven't tried either out myself.
Grommets make the curtains slide easier and park more compactly when opened. Most of our home curtains are grommeted (Ikea) and I really like them. I believe these are also lined for better privacy/light control. Thanks Carol H.!
Wraparound curtains make for better coverage and completely clear the windows
when opened. If I were ordering a new Scamp
I would leave off the stock curtain rods entirely and suspend a continuous rod from the overhead cabinets. These use flexible copper tubing and come courtesy of Elipea in CA.
More information here.