Good luck - I hope everything goes smoothly for you humans as well as the pigs!
My pigs didn't really notice our move last year. I took them down to my parents for a week whilst we finished packing and then did the actual move. They're used to travelling up and down to stay with them when we go on holiday etc, so that didn't upset their routine in the least.
When the pigs returned to the new house they noticed the different smells and noises, but the didn't seem in the least bit bothered and enjoyed munching their way round our much larger lawn. Mind you, my two 'big pigs' are the most relaxed pair in the world - very little seems to phase them.