Regardless of the advice you get on here, you'll have to read the PDS to see what they will or won't cover. Opinions are like arseholes, everyone has one

. A lot of contents policies will cover sporting goods damaged/stolen while not in use (within Australia), some good policies will extend overseas.
I just went back and found a post I put up a couple of years ago in relation to insurance polices and keys hidden on or near the car, highlights the difference between policies and why doing the research can help.
I'm bored, there is no wind and its too hot to go outside. So I've surfed a few Product Disclosure Statements and the devil is in the details, usually in the 'General Exclusions' section. It seems on the point of keys in or on the vehicle there is no consistency in the policy wording on the few that I checked. RAC car insurance exclusions "Failure to take all reasonable care to protect your car, its contents and keys. "Your car being left unattended with the keys in or on it. " SGIO "We don't cover loss or damage caused by or arising from you: ? not taking reasonable care to secure your vehicle" HBF I can't find any reference to keys in or on, or reasonable care to secure. YOUI "What is not covered? "Theft or attempted theft if: the ignition keys were left in the car; the ignition keys were left near the car whilst it was unattended by you;" ALLIANZ "You must during the term of the policy follow and meet all of the policy's terms and conditions. In particular: take all reasonable care to prevent loss of (including theft) or damage to your vehicle. T his includes but is not limited to: ensuring that the ignition keys are not left in the vehicle when no one is in the vehicle; " When we will not pay your claim Theft of your vehicle Any theft of your vehicle unless at the time of the theft: ? the ignition keys were not left in the vehicle whilst the vehicle is unattended; " And APIA for the poleys
Same as HBF, I can't find any reference to keys in or on, or reasonable care to secure.