You might be able to get a trailer there think ive seen more lorries for sale than trailers but that might have changed as missd the last few.
You can buy the catalouge on the day as things getting added really late, would be handy to be able to be nosey before hand tho!!
I went to the one they had last month, and have to say it was very disapointing. The condition of some of the horses going through was not very good, some had only come from Ireland the day before, and were in a poor state, only saw 2 ponies sell, highest bid on a horse was £750, but they did not sell it. There was a trailer there, but it was very untidy.