[rudolfm]

Don't try to prove your innocence, crooks do that 😆

Tell them you came all the way from San Francisco, Alaska, or where ever your home is. German friends told you thatbyoubmust see this wonderful and friendly place. Don't lie, they might for ask ID, but don't offer. If you behave well even though you were just rejected, that is what they expect from you when they let you in.

Naturist cards won't help, don't try.

At some places you can buy tickets online, do so. Don't haggle if they won't let you in, just politely ask for a refund as you can't come again another day. That should get you in.