They say no large camera equipment - which i saw defined somewhere as nothing longer than 600mm (ive seen it somewhere else as 300mm so it would be wise to check) - the important thing to note is that mesurement will apply to the whole kit from the front of the lens to the back of the camera , so it will debar not only tripods but a number of the larger lenses.
In terms of what to hire therefore I'd say something compact and inconspicuous, not one of the big white lenses which will attact attention