This is a personal choice, and there are reasons why you would and wouldn't want one. If you are wanting to share your vows at the top of a mountain after a 3 hour hike, very few celebrants would be happy to go on a journey this long. In this case, a courthouse legal wedding could be done beforehand, with vows being withheld for the spot you want to share your words. To be honest, the most important part of an elopement are the vows that you'll share together! However if you would love to have everything done on the day, and have a spot that isn't too far from the main road, then a celebrant may be better for you!