If I book a date with a girl that offers totally nude massages, how far do they usually go?

What kind? Fantasy or real? I always get a real one. After this then go see a fine indie for realistic fun.

Is it appropriate to ask if there is a HJ or CBJ or completion?

You can not expect anything at the hotel massage places can you?

Just a good massage.

Yes totally Nude From Your Head Down To Your Toes!!
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Sheila Jones

It all depends. If you want a message then you will get one. The other things you've mentioned could be extra, which translates to higher session fee. By the time you add up the extras, you might as well find a well review indie to have more fun IMHO. Of course, I could be wrong about your motive. Hope you find what you look for.