The TGH freq (Aeromed Primary - 47.580 PL 186.2) on the bottom of the above link is good last I checked, although I haven't tuned in in months. Also, Air Secondary, 155.340 PL 167.9, handles all medevacs coming in/out of the area, including LifeNet.
For Bayflite/St. Joe's, try 47.540 PL 127.3. Haven't heard anything on this in quite some time, don't know if it's still active - let me know. The same for 463.050. They probably went Nexthell.
Your best bet may be Air Secondary for Bayflite/St. Joe's.
For actual LZ operations, the HCFR LZ Control talkgroup on the Hills. system is 593/04-101 (simulcast on both sites). That tg is hard-patched with 153.920 PL 100.0, which is a mutual-aid/public safety freq of some sort - don't know the official designation. The FCC says it's licensed to the Sheriff's Office with a control point at Office of Emergency Preparedness.