Are there tourist traps in the Sanya tourist area?

Well, from Wikivoyage:

1 DaDongHai (BigEastSea) (???; Dadonghai) (From the airport, take bus nr. 8.). The main "foreigner area" (especially Russian -- in visitors and signage, there is little English here!) Dadonghai is an easily accessible, beautiful beach -- and tourist/laowai haven. It has a good balance between development and natural beauty. The water is decently clean; the ocean bed is mostly just sand with a rare school of fish or eel. The beach is lined with expensive (and generally not very tasty) restaurants, but the beach is free (although cordoned into "zones" for swimming and boating). The beach is closed at night, but there is a section to the far east (the "military zone") that is just beyond a big fence (with a big hole in it) which is always open. It is not policed or seemingly controlled. The town behind Dadong Bay is more expensive than Sanya, but has foreign restaurants. The shopping, however, may not be as good as Sanya city's. See the beach both in the morning, at sunset (sets gorgeously over the hills), and at night (when people are more scarce). There're beach parties here on weekends, especially, starting early but picking up later (usually after hours) at the "Beach Bar", located in the middle of the beachhead. Just look for music, foreigners, fire torches, and dancing after midnight

Key to note that there's a 'good balance between development and natural beauty'. So hopefully from this, it won't be a total tourist trap for you, although that's obviously a bit subjective.