Depends where you are Bernie. No amount of prevention is guaranteed in my area. One month the sign in the local vet clinic said they treated over 100 dogs for ticks.
Ticks survive in any conditions but they have preferred areas. Coastal mainly and damp humid bush. It also depends on how much bush and shrubs you have as ticks like to go to the top of tall grasses and wait for a victim. They also love bandicoots, we have bandicoots here, many become immune to them - the tick goes thru it's various stages dropping off the bandicoots. And where there is bandicoots there is tall grasses etc.
I've lived in this area for 25 years, prior to that I grew up in the tick capital of Australia the Northern Beaches of Sydney. When I moved to this area I had one tick in 16 years, I moved again still in the same suburb but bingo lots of ticks, I moved again 4 years ago and still ticks.
I've put that much frontline etc on my Setter that she has developed hair follicle tumors. I blame the Frontline and Advantix and I'd still use it if it worked on ticks. But it doesn't in a high tick area because you get multiple ticks and three days to die on the dog with multiple ticks means you will lose a dog. We've had much better luck with the tick collars Preventix. But I don't like them on the dogs year round. So they go on as soon as we find an adult tick on the dogs.
This is a wonderful area for dogs, no limits or licenses etc required, but the ticks and snakes suck. The next place I move to once the skids have left school and got their licenses etc I will be researching to see if it's tick prone.