Ryan O'Carroll was helping his wife into the hammock-style tent when it collapsed, an inquest hears.
A Cornwall dog owner had the skin torn off her middle finger by a lead wound tightly round her hand.
Tracey Clayton says the "inadequacies" of the police investigation meant opportunities were missed.
Complaints against Sgt Colin Taylor - aka the Scilly Sergeant - and a senior officer are upheld.
Candidates standing for election to the European Parliament in the South West region.
How to stay up-to-date with all the action
Sign up for our newsletter