There is an Overlanding trail near Fredericksburg. I've not been there, but from what I'm reading its mostly dirt roads/ranch farm access roads with a few water crossings. Nothing more technical than fording a stream.
Not up there with your skills, but maybe a good way to get people out and do an easy trial run of their gear, procedures, radios... cooing equipment, coolers of beer etc.
I'll PM you the deets.