Could you try it with one wheel in the middle rather than the two wheels? At the minute it looks a little too much like a transit van. Also the word caravan should all be in the same colour letters. The words "accessory shop" could be in grey or another colour.
I think I actually prefer the simpleness of #13. I like the detail on the wheel on #26 but not so sure about the thick line around the caravan. I also like the way the caravan is tilted on #26 and #12.
Also I am not sure whether .co.uk should be included or not. I would prefer not to include but there is also a caravanaccessoryshop.com (a different business).
Although I love the idea behind #28 everyone I have shown it to has said that it looks like an elephant! Therfore I think I am going to have to discount it.
I do like #60. Can you include ".co.uk" in small letters at the bottom right of the logo.
smile added, I think it gives it a character look, instead of just a caravan, it reminds me of a character from the movie cars;) Accessories make a caravan happy....