Hi there, and welcome to the Forums. As a former member of RRU who wore the Khaki and Green as well as the Navy before going over to County, I'd like to address some of the issues you mention.
You say it'd be more realistic, which is defined as: portraying an object like it is in everyday life.
You are correct in stating that the USFS handles all Federal Forest Land, such as the Los Padres, where as the California Dept of Forestry and Fire Protection, a State Agency, handles all State Responsibility Area land which includes a wide mix of timber, forest, brush, mountains, and even cities as a full function Fire and EMS department with many City and County (35!) contracts throughout the State of California.
Here... is where I am a bit confused. Can you tell me what State units are stationed in the Los Angeles area in any way, shape or form? Living in the city of Los Angeles, and working in a Mutual aid zone with County and City, I've never seen a CDF apparatus stationed with the LAFD. The nearest CAL fire units are in Riverside Co, San Diego Co, San Bernardino, or San Luis Obispo to the north. .
Compare that to the Angeles National Forest which shares a common border with Los Angeles City. In the areas of the 210 Corridor up to the 5 freeway and through out the Angeles Crest, USFS firefighters respond direct mutual aid to all Wildland Urban Interface incidents at time of dispatch along with Los Angeles City and County units.
With an USFS response time measured in minutes, and many times having them arrive on scene as quickly as the LAFD and LACoFD units, it doesn't compare to the CDF units which respond to brush fires in the City and County limits in hours after initial time of dispatch.
I believe that an USFS Crew bus may be worked on in the not-so near future to further develop the USFS contingent in the game, especially with so many type I and II crews working in the ANF.
As for the USFS, with 2 Type I engines, and a type 3 already in the game, I'm not sure what having an OES rig would provide except that they look different, especially those weird Westates rigs. LACoFD now has 5 Type III OES Engines modeled after the CDF Model 34/35 configuration. They're currently assigned up north and have been getting pretty rave reviews from the crews on them. That might be one option.
And they're not bad one, but as this is an LA mod, the key has always been to accurately reflect the Los Angeles Area, which unfortunately, unless it is a major fire incident, like the 2003, 2005 and 2007 fires or disaster, like the Northridge Earthquake, Cal Fire does not have a presence in this county. LACoFD is the designated SRA manager for this area which explains why they recieved the Type IIIs and have such a large wildland/forestry program and Camp Crew program.
Mike
Hi, sorry for such a long time with no reply. Thank you for correcting me there are none in LA. Sorry about that but i just joined so i couldn't tell you where every CDF station is

. I was on a family trip to LA and I saw a Type III Engine for Cal-Fire in front of an LA station cant remember which one sorry. So i figured "Oh a CDF station." Thanks once again for the reply Mike.