William,
Minor nitpick: In your above post I think you have the LOCATION type reversed - you seem to imply a "Suburban" location can provide limitations and a "Resort" can't.
Also, the language in the T&S doesn't mention conference destinations, it instead mentions "Conference Center" which at least to my ear sounds like the intent was to describe a specific class of properties.
If conference center simply meant that at one time or another the property hosted a conference would make virtually all properties covered. Additionally, it would remove the need to mention Resorts as an additional exclusion in the language (Unless the T&C's were purposely written to be misleading - which is something that SPG tends not to do, unlike some other brands).
Is there anyway you can research what the intent was of the folks that wrote that particular line of the T&C's? Because how it seems to be used now it seems like the language "subject to availability and Resorts and Conference Centers" can be simplified to "subject to availability".
Can't help you with the conference destination thing. Any hotel hosting a conference is a conference destination, although it seems intuitive that those with the name "conference center" included in their hotel name are probably the easiest to pick out of a line-up.
Unfortunately the ones that it would be useful to pick-out of the lineup would be the "Not a conference center" ones, which sadly doesn't seem to be commonly used as part of hotel names.
Thanks!