Yikes! 19 from the flying field! (I fly R/C planes too - electrics. The ticks are normal-low this year.)
We remove a half-dozen or so from each kid every year, and generally don't worry about it that much. Just know what the signs are, and keep an eye on the former tick location for a while. There are two major things one can have happen: Rocky Mountain Spotted Fever, and Lyme Disease. For the former a rash develops, and for the latter there's a distinctive ring that forms at the former tick location. (Both are potentially very nasty.)