Hi @Terry-And-Robyn0.
Kayaking and canoeing are often considered high risk sports, stopping some schools from continuing the activity in their curriculum.
Even if no charge for the use of the equipment, there will still be a liability, on your head if you knowingly hand over to a beginner with no induction, no instruction, (signed off) correct PPE fit for purpose to age, along with other considerations. How wide is the lake - in terms of: a person’s ability to get back to shore, how deep is the water, how choppy it gets, it’s turbidity etc.
How do you determines the users if the kayaks are competent swimmers? What are your lifesaving PPE options? Lots to consider...
So look, if nothing goes wrong and the equipment is regularly checked for damage, and you have the adult sign adisclaimer for liability... I believe you can still be sued.
Risk management is real and has to happen.
Good equipment regularly documented and dated as maintained, inspected and checked, a risk assessment for all ages and eventualities, including weather conditions etc. safe operating procedures that match and include the specific design and manufacturers specifications and guidelines. I don’t know anything about your area, but theses are the basics.
It is also no good just doing this visually and in your head. It won’t count in a court of law. No evidence to prove you have taken a responsible path.
DETE QLD.
If the links upload, they may give you some help. Safework Australia > Safe Work NSW.
But DETE Qld has great stuff, but each state, although generally under the WHS Act 2011 implemented 2012, state governing bodies rule your area. (Safe Work NSW)
I think you are just going to have to do your research, create your documents, undertake signed off instructions etc, and weigh up the pros and cons. Also check your public liability insurance covers your equipment being used by others, (in case of major injury or drowning) and you might need to up it!