The intended pan/tilt would be able to support say, two or three pounds at least
There's no way you can do that with the style of bracket DROBNJAK is selling. Especially not with cheap Chinese servos full of plastic gears and bushings: they just won't stand up to the loads involved.
I've been working on a design that I haven't built yet, using a lazy susan bearing for panning, and a tilt mechanism similar to the one in that hobbyking design CrashingDutchman linked to. The key is that the servos are used only as motors, not as bearings. For a heavier load like your DSLR, I'd be inclined to go with a geared stepper, but a really heavy-duty servo might be enough.
This approach is based on my experience with commercial pan-tilt mounts for video cameras: they had to be a lot heavier-duty than I thought was needed when I first started working with them. You don't need the same smoothness of motion, but you definitely want something with near-zero slop to avoid vibration while stopped.
A stepper like this or this might work better for doing the tilt than a servo. Especiakly with a heavy load.