I don’t really think that camel toe is a major issue as are wedgies. I have heard of designers using hairspray or starch to keep bikinis from wedging into places it should not be wedged. But I have not heard of any issues with camel toes although I have noticed a few after shooting the Mercedes Benz Fashion Week Swim. After shooting about 1000 girls at MCFWS, there were only 5 at the maximum and I doubt that it would be considered a concern.

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Source: How do models prevent camel toe while walking a show? – Quora