Silicone? That's the WORST thing anyone could use to patch it up. All that will need to be removed and a proper repair done with proper RV materials.
Silicone is designed to be used on a house that doesn't shake, rattle, and vibrate. The "glob silicone on it until it stops leaking" repair is only slightly more sophisticated than using duct tape and a hammer.
But I would reconsider wood or any sort of wood grain. It will make the camper feel very dark and cramped inside, no matter how light the wood is. Light colors closer to white will make the camper feel roomier and brighter.