Great camping other than biting flies

It was my 3rd time camping at LBL never had any issues at any of the other campgrounds at LBL. But this time was different it’s a beautiful campsite on the lake so it’s everything you should want for camping even close to a bathroom. But there was so many biting flies. Literally drawing blood so my kids and family hated it my niece literally went home with bite marks all over her legs. I made sure to spray the bug spray although even that barely stopped them great at night though lol.