Got me an old camtrakker nondigital and am ready to upgrade.

Can you take out, put in memory cards even with a bear safe box on it, WITHOUT TAKING THE ENTIRE UNIT OFF THE TREE?

Also, where can you get memory cards cheap? I imagine with 3.0 megapixels (I'm guessing the pre-2005 cameras had lower mexapixels?), pictures will use up a lot of memory so I'm interested in cards that hold a lot of memory.

Thanks!