You've chosen the safe route :-) IANAL, but I would say depending on your level of paranoia, you can do nudity or action (but be careful with the latter). A warning page will cut your sales by 20-50% over no warning page but might be a good middle-ground as well. Another good route is geo-targeting your tours so visitors outside of the US in more liberal jurisdictions regarding gays (that seems to include Saudi Arabia these days) get a better/racier tour...check your stats, likely a large percentage of your visitors are not US-based.

Translation is a good second step here but not crucial for lots of Europeans. If you are interested in routing based on country, there's a couple of good ways to do it and it's not too tough, plus there's some good people I know of who can help if you see some success and want to translate pages (starter languages: UK/unamericanized english, German, Dutch, French, Spanish, Italian). You also should consider maximizing Euro traffic by accepting cc in their languages, dialer, stuff like that for alternate billing.

-doug