Also very familiar with CFU. Been flying there every Summer for the last 25 years.
I'm not an ATC expert. But the chart says "not authorised" for the RNAV circling. So I would imagine ATC can only offer the RNAV approach when 35 is in use. What you choose to do on the day is up to you. Just don't screw it up if you are bending or flexing the rules.
I've seen at least two careers come to an abrupt end when things went wrong operating outside the rules on "visuals". One involved actual damage, the other very nearly ended up in the water at CFU.