Over the years i've attended and recorded several ceremonies (i.e. weddings), live performances (i.e. concerts), and sporting events. In order to get a camera at a more elevated position above the crowds, i've decided on using this inexpensive 12' Tripod.
With an ultra wide lens, you could further exaggerate the appearance of height. When using a GoPro camera's widest setting you could capture large crowds, or easily show off large spaces.
With a camera placed so high, it's important to choose one that can be operated remotely. Most new cameras offer WiFi apps that allow you to see the video feed, start/stop video, and also change camera settings. Cameras like the new GH4, Sony RX100, or GoPro. Without a WiFi App, you could also drop an HDMI cable from the camera down to a remote monitor, and control start/stop with either an infrared, tethered, or wireless shutter remote.
Often found as a 'Laser Tripod', 'Constuction Tripod', 'Contractors Tripod', or 'Elevator (elevation) Tripod', it's an inexpensive way to place a lightweight camera up high. By adding a small remote motorized Pan/Tilt head you could further add an interesting dynamic camera angle.
Unfortunately the 12' foot version that I have is currently out of stock. I'll share the link in case you want to take a look (click here).
12 Foot Elevator Aluminum Laser Level Tripod
Otherwise there seems to be a good number of 9' foot (or taller) versions that can be found on eBay (check products here).
Contractor Construction Laser Tripods via eBay
Here's that important Panning Base to drop it from a 5/8" to a 1/4"-20.
Laser Tripod 5/8-11 by 1/4-20 Threaded Female to Male Tripod Adapter
This Special Tripod Leveling Adapter Can save you hours and speed up your workflow.