My band has in the past... but we had two graphic artist in the band with all the lastest graphic software. Plus the drummer's wife is a professional artist and photographer.
My advice is to find a College / Vo-tech / or specialty school near by and ask a professor for the name and number of a student. Most will work with you hands on to get the vision you want on paper and will do it cheaper than most professionals will because they want to pad their portfollio when they get out and job hunt. So you know it will be quality work, not just another job to get done before 5. Plus they'll have all the software and printing facilities at their disposal.
Then again it is amazing what a creative person can do with a comon computer, digital camera, a few fonts, and a store bought printer. Like Music sometimes it's the imagination that is limiting, not the equipment.