Good luck,
Some suggestions:
1. Photos of the specific trailer you will be using (inside and out).
2. Close-ups of special things inside the trailer.
3. Look at how other hosts post photos. I found that helpful when I set up my listing. I'm always suspicious of host photos that show everything around the area, but not specific photos of the place.
4. Look at other prices in the area, but make sure whatever you charge will compensate you for wear and tear on your property (some people are neater than others) and the time it will take to clean after they are gone. I know of some in my area who charge $68 a night for a large space, then I find out it's one bed and an air mattress or two. I charge $115 and up and I'm firm about that. It takes 4 hours to clean the apartment even when people are neat.
5. Set a maximum number of guests for your space. I have a huge space but I set the max at 4 because I have a tenant in another unit. Still people will ask if they can do more people (I say no) or if they can host a party (No) or if they can have a discount (no). I can't imagine 6 people in a fifth wheel comfortably without being messy but that's something you can determine.
You are providing linens and electricity and beds, etc. That has value.
But since the other listings make things confusing (and are now off line) I would put a quick note on the listing saying you were thrilled to be a host to many visitors for the Eclipse.
Good luck!