Thermacell is pretty specific to mosquitos.
As Howler said you need to use permethrin. I live in Kansas and hunt those tick infested woods and use permethrin. You do not spray it on your skin you saturate your clothes and let it dry and your good for a couple weeks.
I have been using it the last couple of years and have gone tickless and I hunt a lot.
There are several companies that make products with permethrin but I like the Sawyer Premium brand.
good luck!