I'm using "OFF!" Tropical (the orange one) it is using Picaridin which is much less aggressive than DEET (as in: doesn't dissolve your ropes and clothes!) and still efficient enough. It is also the cheapest available in NZ, when you compare the price per litre: https://shop.countdown.co.nz/Shop/ProductDetails?stockcode=729772
Because it is a simple spray you can repack it in a smaller container when going tramping. I use a 50 ml bottle for that.