There are several ways to keep the bugs away from your campsite. First of all, make sure there aren't any stagnant water areas nearby where mosquitoes could breed (e.g., drains). Second, try using bug repellents such as citronella candles or sprays that contain DEET (which can be harmful if used incorrectly). Thirdly, simply stay inside your tent or camper when you're sleeping, or better yet; just go inside for the night.