I had my camino-tattoo done along the route, in Fisterre. I'm very pleased with the result, the tattoo still looks smooth and perfect.
But this is my 10th tattoo, so I have a lot of experience getting tattoo's and knew exactly what to expect. Number 1 till 9 are done by tattoo artists I know and trust, but I just felt my camino tattoo should be done on the camino. It was a risk, I know, but everything turned out alright. But if this is your first tattoo, I stronly recommend not to get it on the camino! I knew how my body would react, know how I can handle pain and discomfort, and this was not even my first camino. If you don't know how you will react to the pain (I got very nausseated from my first tattoo and needed to lie down, the pain literally made me sick) and you're in an environment you're not familiar with, perhaps already very tired from walking or having pain at other places, like blisters.... better don't do it. If you have more tattoo's already and feel fine on your camino: go for it. It's the most special tattoo I have, and getting it at the end of my camino was a very special experience
There was something else I had to consider before getting this tattoo: a new tattoo needs to be taken very well care off and NEEDS TO BE OUT OF THE SUN FOR AT LEAST 6 WEEKS!!!! Since my tattoo is on my lower arm, close to my wrist, that seemed impossible on the sunny camino in the middle of the summer. It meant I had to walk around in the heat with long sleeves. Luckily for me, the end of my camino was very rainy. I had rainrainrain for a week and had to wear pullover and raincoat. 3 days after I got my tattoo and was already passed Muxia, the sun came through and it got too warm for the raincoat. My solution: I've taken an old sock and cut the foot off. I've been wearing that old sock around my arm for weeks, while people kept asking if my arm was wounded.
My tattoo artist is Rolo Tattoo's, you'll find him at the end of the village Finisterre, along the official camino in a fork of the road. On the way to the lighthouse on your left hand, close to the old medieval church. He could only speak Spanish, but was very patient and understanding. I had learned the Spanish words for white, black, outline and shade and could with that exactly explain what I wanted. I would certainly recomend him, his shop was hygienic and professional. I know there's a tattoo-artist in Santiago too but I don't have experience with them, nor heard anything about them form anyone else.
I've posted a photo of my camino tattoo here, taken just 5 mins after the tattoo was done, so it still looks raw and red. I've designed this one myself, and carried the design around for weeks during my camino, looking at it while walking to decide if I really wanted this.