is it acceptable for a resume to be more than one page long?

I'm 28 years old and have held various positions ranging from publicist to radio producer to political campaigner. I could pick just the best stuff and leave it at one page. But I feel like there is more that could be told about my skills and experience, which would flow onto two pages. However, I have been told that it can seem pompous for someone my age to have a two-page resume. Thoughts?