Visit Isles of Scilly said Ms Bond had headed up its public relations for more than six years and was on a “trip of lifetime” with friends in Argentina and Chile.
She was out hiking when she became trapped in the storm, the organisation said.
Mr Sells said she had “worked tirelessly” in her role to promote the islands, 28 miles off the Cornish coast, and was an “integral part” of the team.
He said: “She was always a joy to work with, and I cannot praise her work too highly. She is an enormous loss to the community.”
Euan Rodger, executive vice-chairman of Visit Isles of Scilly, said the organisation was “heartbroken”.
“She brought life, energy, and an infectious enthusiasm to every project, making her a true joy to work alongside,” he said.
