How can I select and move multiple items (text and form fields) within my document without holding the control key and selecting every single one?
Sure it's possible. You can select multiple fields (and other items) by pressing down on the page with the left mouse button, holding it pressed and then dragging over the fields you want to select. All of the fields that fall (even partially) within the area you mark will be selected when you let go of the mouse button.
Another option is to select a range of fields in the Fields List panel (in Form Edit mode), by clicking the first one and then Shift+Clicking the last one.
As always, you are awesome. Thanks!