A 2 horse trailer or stock trailer should work. You can look into having a divider made or livestock trailers generally have a split gate. That away if you are taking does/bucks or just need to separate then you have 2 'pens.' Unless it's an emergency visit, then I would always plan on taking a buddy along.
We haul kids up to adult Boer to shows every summer and it does freak them out, but they get used to it. If we have one that stresses easy at home during any changes, we try to give them B-Complex and Probiotics prior to the trip to help with stress, sometimes even add in some Spectogard so they don't start scouring.
I like the TSC Goats prefer brand Probiotic Power powder, I mix that with B-Complex (injectable) and a little water in a drench gun and give it that way vs giving injection of B Complex.
We have a 16' stock trailer that has open slots on the sides, and my only complaint about our trailer (we're currently renovating if my husband ever finds time to get the welding done, ugh!), the open slots and rain or cold weather don't mesh well! So keep weather in mind when trailer shopping. We've rigged this thing up in the past to help keep them dry, but I'm over that too lol. But it does work for random travel
