I would sell separately.
Ive sold many campers and cars on craigs list without any problems what so ever.
Yes there are scammers on there but its very easy to recognize when you receive the email.
Very simple,sell for cash only.Do not agree to ship via a shipping company and anything to do with western union is a red flag.Cash only,cash,cash,cash.May take some time but it only takes one person to buy so have patience.Dont be alone when anyone comes to look.Most people are honest.Clean it to look spotless.If you find somewhere to do consignment you are going to take a huge hit over selling outright.Up to you how fast you need to sell.Either way you are going to take a hefty hit.Camper resale is worse then cars.Good luck!