As I have allergies myself I can relate to the problens even natural remedies can cause.
How about having some guineas clean your space? They are great for tick and bug control, but you would probably need some ear plugs and a mostly deaf neighbourhood to be comfortable around them
Some...
I would rather use natural lavender oil and similar on my childrens clothes, shoes and similar scented natural body lotion to keep the bugs away and, of course, check the kids several times a day for any ticks.
Just reading about the detrimental long lasting effect the above mentioned poison...