Page I'm trying to isolate from the rest of my website: http://www.goffstownlibrary.com/wifi-access
(eventually there will be a button that users should click to agree/proceed to the rest of the site).

I've been able to remove the sidebars via ATO Style & Configure SIDEBARS.
I used CSS inserts to remove the header info for one particular web page as per http://forum.bytesforall.com/showthread.php?t=3123 & it worked great, thank you.

I am still trying to remove a few more pieces from this one particular web page -
The header image had been hyperlinked - how to remove that on this page only
& also , how to remove the DYNAMIC WIDGET AREAS?

In Configure Header Area I have:
%bar1 <?php bfa_widget_area('name=Top of Page Area Spaces &cells=3&before_widget=<div id="%1$s" class="header-widget %2$s">&after_widget=</div>'); ?> %bar2
%image %page-center %bar1

Thanks for your great forums, I always find the answers I need here.

There is a new div section with a class of 'header-image-container-pre' that was added to allow full width headers, so where you have (in CSS Inserts)

body.page-id-2353 div#imagecontainer {
    display: none;
}

change it to

body.page-id-2353 div.header-image-container-pre  {
    display: none;
}

to get rid of the dynamic widget areas in the header, look at the source of the page and find the widget area code (the HTML) then code a CSS selector like you used for teh removing the image and put in a 'display: none'.

you could actually combing the two so you have

body.page-id-2353 <new selector goes here>,
    body.page-id-2353 div.header-image-container-pre  {
    display: none;
}

(and yes I'm going to make you learn how to find the selector)

Thank you! This has been helpful.
Going to file this away for now since it looks like we're not going to need the page modifications at this time.