Went there a couple of years ago, loved every minute & can't wait to return, but couldn't find any GA aircraft. Air Mauritius operate a few Jetrangers that fly rich folk to the various golf courses & hotels but little else. Apart from anything else there is absolutely nowhere to land if the donkey quits, the island is covered with sugar cane or boulders, landing off shore would be fraught with danger, the coral reef would cut you to ribbons
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PM me if you want some good places to go that may not appear in the tourist guides.