Make DAMN sure you ALWAYS bring along mouth calls as well! And.. be practiced with them and know how to use them. Be careful when you put your remote control into your pack to make sure nothing is pressing the buttons on the remote! Stuff pressing on your buttons can equal dead remote when you arrive at your location after that long drive in! (Hence the reason I say ALWAYS bring your mouth calls as well!)
Definitely bring a motion decoy. Especially for Bobcats! Had a Bobcat just 7-8 yds from me and didn't know it, until I went to stand up from my sit. He was crouched on the ground staring at the crappy ICOTec 300 caller, but fixated on that MOJO!
When using mouth calls, don't feel like you have to blow the piss out of them to make them loud. You don't. Just let their design do the work. Just blow regular amount of air, and concentrate on all the emboucher mouth tricks and jaw tricks you need to do to make the distress call sound more intense and desperate and have realism. Not blowing the crap outta the call will go a long way toward you sticking with it and enjoying the experience more.
Mouth calls tend to be very loud and very crisp and clear sounding. You might try setting up your eCaller... but starting off with the Mouth Call for a bit. Imagine in your minds eye the Mouth call catching their attention from a ways off... then you switch it over to your eCaller. So like, let's say you mouth call all intensely... then you have an eCaller sound that sounds more like the animal is worn out and exhausted. Those two would logically go together. One following the other.
Also think about the critter you're trying to replicate. Is that little bunny gonna have the lung capacity to wail that damn long uninterrupted? Probably not. So ya gotta give it breaks in the eCaller playback that make sense.
And finally, when you're done with that set... give it a good 10-15 min before you get up to gather the stuff. You never know when a straggler may waltz on in, staring at your motion decoy.
BTW, when Turkey Vultures start circling over your set trying to figure out where that critter is, you know you're doing something right when you're blowing those calls! Same with Hawks/Crows coming in.