I changed the encryption setting on the EMS dispatch channel. During my weekend visit to HHI, I noted that the dispatcher and some EMS units are in the clear on EMS dispatch talkgroup now. Not sure how long that's been the case, or how long it will last. Quite a few EMS units (trucks) are still encrypted. so it's a mix, and somewhat annoying to listen to. But dispatches are in the clear.
When using the HP1, and any database-driven scanner, it's critical to understand which site of Palmetto 800 you're monitoring. If your range is set to Max, then your scanner is probably trying to scan all ~80 sites of Palmetto 800, so it's spending a lot of time cycling through frequencies of sites that aren't anywhere any range of your scanner.
Your best bet is to set up a Favorites list, and add only the Beaufort County Simulcast site, along with either the Bluffton, Port Royal or Yemmassee sites, depending on what area of the county you are in. Understand that the Beaufort County simulcast site operates as it's own "system", carrying all of the Beaufort County talkgroups, in addition to a few SCHP talkgroups. The Bluffton, Port Royal and Yemmassee sites will carry all of the "other" Palmetto 800 talkgroups (all of the other State agencies, plus Jasper, Hampton. Colleton Counties, med helicopters, etc). So you want to scan both the Beaufort County Simulcast site plus the other nearby "state" site to hear "all" traffic. You want to avoid, or remove, all of the other Palmetto 800 sites from your scan list.
As others have pointed out, the Beaufort County site is simulcast. Depending on where you are located within Beaufort County, that could cause your scanner trouble in properly decoding transmissions on that site. I find that at Hilton Head, there is only a single site of the simulcast system here, and so my older trunk tracking scanners work fine, with no decoding issues. That's probably not the case in Beaufort or other areas of the county. But regardless, even with older scanners, you should hear "something" if you're scanning the appropriate sites, even if it's garbled mess.
Best of luck with your efforts.