As a gardener, I can relate to your predicament.
Most people, especially the well heeled, seem to regard those who work manually, to be unskilled, and, hence, not worthy of a decent rate of pay. Add to this, and this is especially so in my profession, people who decide that they are 'professional gardeners', without education/training who undercut the established businesses. A second insult, is the rise of the 'Landscape Architect', the majority of which are a bunch of doodlers who couldn't plant a bean seed in a Styrofoam cup and have it grow, but that is another rant. :angry:
The worst part is that the buying public is ignorant of the skills/experience/creativity that I bring to the table. They just see it as money they can save by using the cheapest guy out there.
I see professional photographers in the same/similar boat. You have the skill/experience and most of all, the creativity, but your clients think their employees can take a few snaps of the event for no extra expense, that will be just as good as yours.
In my opinion, charge what you feel is right. You may not get as many takers, but you don't have to waste your time on lowballers and jobs that won't give you any pleasure.