I have quite a few photographers wanting to do shoots at our lavender farm and I have no idea what to charge. What is a usual fee for a location? Is it by the hour? I would like to get folks to pick some lavender, so can I make it a minimum number of bunches per shoot instead of an amount of money? Is it normal to have any kind of release or paperwork from the location side? I am happy to do trade for print arrangements to get some nice shots of the farm too - so what is normal in that regard? I want it to be fair for everyone. Thanks!