Yes I have worn diapers to school when I was in grade school and it felt great.
I was scared at first and it was a thrill having a diaper on under my pants.
At the time I was wearing those Pampers Plastic Backed thick diapers that crinkled and I could hear the crinkle and was paranoid that others would hear it as well.
But after a few months of wearing Pampers Diapers to school nobody ever said anything or noticed and I continued to wear those Pampers Diapers to school.
I could just go pee in the diaper in school when in class as well and nobody noticed and I would change the diaper when at home.