Three44s, well said. I was going to say something along those lines, but I think you've got it pretty well covered. I too am a fan of the open reed calls, seems like the sound quality is better than a closed reed, plus they don't seem to hold spit and freeze up as bad when it's really cold. I usually have a Carver, and 2-3 Tony Tebbes on my neck. I'm not sure which models they are, the Carver is fancy burlwood looking thing and the Tebbes are a Red, Yellow, and Orange (jackrabbit, cottontail and mouse squeeker if memory serves) I'd like to add either a Carver or Tebbes howler as well but I haven't picked one up yet (been relying on the FoxPro for yote noises)
I pack around a FoxPro Wildfire II as well. I have a SP55 external speaker and a Foxjack2 decoy with it. I often just use the decoy without even turning the caller on, and use mouth calls. I don't think it's absolutely necessary, but it just gives them the visual they're looking for and takes their attention anyway from me. I almost never use the SP55 either, but when I'm in Eastern MT the extra volume is nice.
All this extra crap isn't necessary, but I like having it and not needing it, vs needing and not having it. I've just been picking up a new call or two every year or so(took about 10 years to finally buy the FoxPro... I'm a cheap-ass). Predator calls are like potato chips, ya can't just have one