I've been at nude beaches and nude campsites a lot of times, add public mixed saunas to that too, so I guess for me to go nude wouldn't take much effort, heh.
BTW here you can opt for clothes on a nude campsite, but on most nude beaches here you are not allowed to be there if you're not nude yourself. So you wouldn't have much choice then :P
On the campsites its funny too, because most of them have their own bar/supermarket. So I crossed off nude drinking and nude shopping off my to do list a long time ago
The last 10-15 years I only go to saunas. The beach and campsite thing is something some friends of my parents came up with, and is more a childhood thing. It helped me feel at ease with my body though, no matter what shape it has at the time.