Bring a decent cooler. You won't need to add any heat the corals will be fine for many hours as long as they arent put into intense hot or cold enviornments. Research what dip you would like to use. I'm a fan of coral rx and red sea dipx. You will want to float your bags or containers in your tank to match temp when you get home, mix up your dip and have a bowl of fresh sw from your tank next to it. Follow dip instructions, rinse coral in the bowl of fresh sw then add it into your tank.
Not much to it.
Personally I don't like dipping corals at all
It seems like dips don't really help with any of the major problems you might get, and you're better off just buying good frags
If you're looking at colonies that might be a different story.