I'll be 5 weeks post LLETZ on Monday & i've just come back from 2 weeks in the south of France.
I was unsure as to where i stood with swimming whilst away as well so i called the nurse at the hospital and she told me that it was standard practice to state no baths, sex, swimming, tampons for 4-6 weeks BUT in truth it was a judgement call. She told me that if everything had cleared up then it should be fine to take a few dips in the pool to cool down and so i did. Not in the first week (3 weeks post-op) but i was in the pool plenty of times the second week and touch wood, everything seems perfectly fine.
However, they obviously tell you these timescales to limit your risk of infection. I was swimming in a very clean chlorinated pool. Where are you swimming with the dolphins? If in the sea i cant imagine there would be too much risk (after all they used to tell new mums to take salt baths to speed up healing) but if it was in a "man made" environment it might be a bit trickier.
Do you know whether your area offers treatment at the same time as colposcopy (if needed)?
(ps - completely irrelevant to the whole colposcopy situation but my fiancee & I are having our honeymoon in Mexico in November and we're also going swimming with dolphins. It's always been a dream of mine too )