I have not been here since the late 1990s, but Foxfire cabins on the Sabinal River would lend itself to a conclave (on the river, nice accommodations, central meeting places).
I just took a look at Shonto Ranch online because it sounded appealing from the description above. I have to say -- and this is my opinion and I know not everyone shares it -- that I believe high fence ranches rob us of a public resource, interrupt gene flow, and are generally bad for wildlife. Hunting in Texas generally does not conform to traditional ideas of fair chase, with our feeders and food plots. I could go on about deer breeding programs, managed-land deer permits, and exotics. But I won't.
As an alternative -- and if folks are most interested in Rio Grande cichlids and Guadalupe bass -- Central Texas, using Georgetown, Austin, or one of the nearby state parks (Pedernales Falls SP, Colorado Bend SP, Blanco SP) are all options. The Lampasas River, which I've been exploring lately, is nearly unfished, can accomodate three or four walking anglers easily, and has some easy access about 25 minutes from Georgetown -- also incredible diversity (Guadalupe bass, LMB, carp, white bass, freshwater drum, channel cats). Pure strain Guadalupe bass in Brushy Creek, parts of the San Gabriel River, and in Onion Creek. Rios in the Gabe, Brushy and Onion.
Also of note: Living Waters Fly Fishing is a world-class shop in Round Rock, and The Well (60+ whiskeys) in Georgetown is slated to be open by then. Chris Barclay is rumored to be coming to the Round Rock area in early June. ;-)
A Brushy Creek Guadalupe bass from last week (carbon rod, but a 2 wt!) and a Rio from Onion Creek earlier in the year shown below.
I'll talk to Larry this afternoon (after he is done preaching and going to Luby's, ya know), see what he has in mind!
Onion Creek LMB (oh, hey ... a glass rod!):
Onion Creek Guadalupe bass:
Lampasas River greenie:
Lampasas River channel cat:
Brushy Creek scenery (last week):
San Gabriel River scenery:
Lampasas scenery:
Onion Creek scenery:
All of the above within a 60-mile radius, most much closer. Plus, Orvis company store in Austin, another fly shop (Sportsman's Finest) on the southwest side of town, and both Cabelas and Bass Pro. And two FFI clubs for local participation.