KateTheShrew, do you still have your copy of Bryce, and what version is it? Maybe we could get you going on that. Its actually pretty easy to use once you know how. If you wanted to move the mountain (you can move any mountain!) in version 5 (this may or may not apply to earlier versions, haven't tried them), you would click on the word "Edit" at the top of the screen (you see "Create", "Edit", "Sky & Fog". They are three separate menus, and you start in the "Create" menu. Now you have the edit controls.
The middle control (a little box with arrows sticking out of it) lets you move stuff. hover the mouse over one of the arrows sticking out of it (there's two each for the X, Y and Z axes), and click and drag. Or, if you prefer to specify exact numbers instead of using the mouse, click on the letter "A" to display attributes of the currently highlighted object, then you can enter values in the position fields.
I actually haven't bothered with individual cameras other than the main camera or main view that you are already using. To do that, simply drag the trackball around.