My only trailer is a big horse one - costs a fortune in fuel to tow that around.l have carried my big goats, sheep, etc in the back of a Landrover, and now we have a Ford Ranger with a large back on it, in there. To be honest, they enjoy standing up looking out of the back window!! Much better than a trailer they say.
I did move three pygmy goats with large horns (one an intact male) from Newcastle, in the back of a small van. I put cardboard on the back windows, just in case the male decided to headbutt the glass on the motorway!!
I always take my goat kids to the vets for disbudding in a large dog crate - carry it straight into the vets, and then pop them back in and bring them home. Much easier than carrying numerous goats in and out of cars.