I just booked my trials for hair and makeup (two different vendors). My question is do we tip for the trials? The trial for my hair is costing the same as the day of, so I'm not sure whether I should tip or not (I am traveling to the salon for both the trial and for the day of). For the makeup trial however the artist is coming to me for both the trial and the day of. I've heard that if they travel to you it is not customary to tip. Any advice would be appreciated!