You guys with tick problems, I strongly suggest you all go out and pick up some of this:
A 1 lb pail is enough to make 25 gallons of high strength mixture and heavily coat 1 acre. You can spray the foundation of your house too. Should be around $60 for a pail.
This stuff will nuke just about every bug flying or crawling that comes in contact with it including ticks, ants, water bugs, wasps, and wolf spiders. I've always had a problem with wolf spiders around my place and this stuff slaughters them wholesale. Before I started using it, during the first cold snap of the year, the inside of my house would look like the scene from Starship Troopers where the base was getting overrun by bugs with wolf spiders sneaking in all over! Haven't had a tick problem since spraying it either. Can't remember the last time I've even seen one...
I like to put it down twice a year, early in the spring when the bugs start hatching and around the start of July when they're established, when the weather forecast calls for a week or so of dry weather so it sticks around and as many bugs as possible come in contact with it. 3 days of dry weather for it to do a good job would be a good minimum.
I treated my roughly 1 acre yard this past Sunday and there are nearly no flying insects around now. This is very noticeable at night. Thankfully rain has held off since we got about 4" here locally last week so it's really had a chance to work.