Drentel - I guess your chances of controlling mice does depend on where you live. I once lived in a house and I tried traps, poison and everything I could find to get rid of mice. Eventually, I called an exterminator.
For some reason, I thought the exterminator would have a better method of getting rid of the mice, but he ended up doing the same things I did with the traps and poison. I didn't see any mice for a while then they were back.
Finally, I decided to take matters into my own hands again. I crawled under the house and found every crack and opening where a mouse might be able to enter the house. I closed them all off and that was the end of my mice problem.