Erm, kind-of a summary from my experience when I went on the flyer.
1. No, the flyer does NOT stop at all, even when people need to get on board. The flyer is just slow enough to let all the passengers [2 to 28] to enter a cabin when it reaches the 'base'. Don't believe? Look from the garden below. No need to pay to observe.
2. No tripods allowed. BUT, there's railings at the side. Gorrilapods are your best bet. If you have a minipod [enough to support your camera], maybe you could set it up on the floor of the cabin. [hey, you're elevated.] Otherwise, you can place your camera on the floor and shoot.
3. You'll get a lot of glare / reflection when shooting inside the cabin. Polarizer filter is recommended.
4. Flight is normally ~30 minutes. Take some time to bask in the awesomeness of the magnificent view.
Hope this helps!