Not an end all be all by itself but changing your light on the side of the camper with a yellow bulb helps a whole lot to keep them from coming 'to' your RV and hanging out under the awning lying in wait for you.
I've spent what seems like hundreds of dollars trying to find a bug repellant that works and won't kill me. This is what I finally found that actually works naturally. I don't use anything but this and my RV is free of skeeters. I use it on the dogs and myself too.
I use a horse spray made with natural marigold and spray around the front door and the steps, "under the awning"(this is where they hang out waiting for you to come home to open the door), under chairs and picnic tables.
This stuff WORKS. And is natural/safe to use compared to all other bug repellents. If you can't find this any 'citronella oil' horse spray works also. Tractor supply carries them and they are very inexpensive.
We must be willing to get rid of the life we've planned,
so as to have the life that is waiting for us.