I remember being at a sleepover when I was 8 years old and I wore a Pampers plastic backed diaper.
I put the diaper on before bed and wore the diaper without my friend finding out.
I could hear the crinkling of my diaper and though my friend would notice but he didn't notice.
I then just wore the diaper until I went home the next day.
It was a fun experience wearing the diaper and since I was a bed wetter I would've wet the bed if I hadn't worn the diaper to the sleepover.
The diaper was a good idea or I would've wet his bed and we shared the same bed.