Question - is it possible? Elements & widgets - background banner and text

So my question is really a is it possible - I know that I can do this with advanced custom fields - but I try to use fewer plugins if I can..

In functions file I call a widget

	register_sidebar( array(
		'name'          => 'Home Page Banner',
		'id'            => 'widget_banner',
		'before_widget' => '<div class="w_banner">',
		'after_widget'  => '</div>',
		'before_title'  => '<h4 class="widgettitle">',
		'after_title'   => '</h4>',
	) );

So use Elements as a Hook to call this widget

<?php if ( is_active_sidebar( 'widget_banner' )) { ?>
<div id="widget_banner">
	<div class="widget_banner"> 
		<?php dynamic_sidebar( 'widget_banner' ); ?>
	</div>
	<div class="clear"></div>
</div>
<?php } ?>

Then in the widget itself I can pull in whatever is needed - however if this instant I want a banner full width image PLUS text over laying that banner - my question is - is it possible to have 2 areas in that widget - 1. an image and 2. a HTML text box - the image is used as a background image within the elements hook code and then text then overlaid

I know I can create the banner image with in CSS or in the widget itself or even into the element hook itself - but thinking of a client updating in future it would be simpler for them if they only needed to edit a widget and replace with a new image?

Is this possible with GPP? Its so versatile I was not sure! I did search but couldn't see anything - so this might be outside the support remit - which is 100% fine - just thought that I would ask

Thank you
Sarah