You need a comfortable place to make you sleep soundly every night. A well-ventilated room is comfortable as it allows more air to circulate.
What you need to do is open your windows to let fresh air into your room. Try to sleep in dark and quiet room. Do some exercise appropriate for you. This will help you feel tired enough to have a relaxed sleep at night. Eat light supper if you eat in the hour or so before bedtime. Going to bed with a light stomach helps you sleep well. Make it a habit to be in bed at a regular time each night. Avoid drinking coffee, before going to bed. Think of happy thoughts and set aside concerns like paying rv insurance for the next day. And pray before you go to sleep.