While I don't know much about ICEMA anymore, as it has been some time since I worked there, I can offer up a little something in regards to Kern County...
I am currently a paramedic with our critical care division, and hopefully I can expand and/ or clarify on some of what NPO has touched on already regarding our division.
Since we are a different division altogether we do in fact work under our nurses protocols. Anything that is within our normal (Kern County) paramedic scope of practice, our nurses can do, so in theory this includes giving them the ability to intubate, which to my knowledge is not that uncommon in the rest of the country where paramedics seem to be given much more responsibility (and credit). We are allowed RSI both on our ground unit, and obviously our HEMS as well. We do utilize the King Vision as shown by NPO, and there is talks about us hopefully getting Ketamine back for RSI, possibly adding surgical cricothyrotomy to our nurses scope, and perhaps eventually a sepsis protocol for our division, which to my knowledge is actually required, or requested by CAMTS.
As far as the ventilators being used, I am aware of a protocol in the works, but can't really specify for sure the time frame as to when it will be approved (perhaps NPO knows first hand). What I can say is that for our division we are now to use in on all patients requiring mechanical ventilatory support; this includes IFT and scene (911) calls.
To the op, to be completely honest between us both, I would not wager my paramedic career in Texas to move back here. I grew up here as well, and this is home for my family, but from a career standpoint it is so much more limited, particularly for someone seeking to provide a level of paramedicine that isn't typically taught in the average American paramedic curriculum. The scope you mentioned in a previous post in regards to the meds allowed by ground paramedics in your state is a testament (IMO) to the level of trust given to prehospital providers elsewhere, and fortunately for you, it's much easier to implement your scope of practice as a true critical care paramedic. I am by no means bickering FWIW, as I really enjoy what I do, and do indeed work for (again, in my opinion) the best private ambulance provider in the state.