I put THIS
on my starboard side middle window to try and match the port side window which came from Scamp
with frosted "glass."
So far it has held up just fine, about six months through a NC winter and this week up to 98 degrees F. You might see shapes from the outside, enough to know someone was in the camper (at night assuming interior lights
are on) but you could not see any details. I am pretty sure you could not even tell if it were a man or woman inside. I had enough to do the bathroom window at my house also. If you want to send me a SASE I will send you a sample.
They make different patterns so more privacy might be possible.
My photos did not come out well at night due to white balance (makes the white camper look blue) but maybe give you an idea.