Apple TV with iPad - for Business

I am trying to replace as much of my Win7 laptop as possible with my new iPad. My only struggle so far is with presentations. I have my projector (with an HDMI port) that I am thinking I could connect to an Apple TV; however, I am frequently presenting in locations that have either no Wi-Fi or a secured connection that I would not be allowed to access. Do I have to have a Wi-Fi connection in order to connect my iPad to Apple TV? If so, would I be able to use the "Personal Hotspot" from the iPad?