I would think that by the time you could deploy the mat and get set up on it, your prey would have either noticed all this unnatural activity going on or simply moved on to the next task on its daily schedule.
You can use nerve agents to protect yourself against chiggers and ticks, but if you prefer something with fewer potential side effects, just use a sulfur ball.
For those not familiar with it, it is exactly what it sounds like. It is a ball of elemental sulfur about the size of a baseball. You can get them at most farm supply stores. Stick the sulfur ball in an old tube sock and then beat the ball against the hem of your trousers, the waistline of your trousers and the cuffs of your jacket; the places where vermin will try to get inside your clothing. The sulfur is an effective deterrent so you can walk through as well as lay prone in the bush and be very safe from the blood suckers without needing a mat. Launder the clothing separately from other clothing and you should not have any lingering odor of the sulfur when you return to civilzation.