I happen to like spiders, and I prefer they stay outside. But around my RV in the park I live in surrounded by heavy gravel I have spiders EVERYWHERE, from the roof to the ground. I also have bi...
Peppermint oil (15 drops) mixed with a quart of water and sprayed in the areas that they can come in will keep them out. I spray inside and outside around windows, the electric hookup, all my outside storage doors, door, awning arms, and around my tires. We have never really had a major problem with them after I began spraying.
I don't kill them because they do have a purpose, just not in my house or RV!