With the number and variety of your band, mixing becomes more difficult and more critical. It may be time to get a sound man. For instance, when you switch from guitar to banjo, the volume change is stark! and must be brought down immediately on the banjo. A sound man is a blessing when you don't have to worry about anything but the gig. The addition of a drummer to your musicians seems to indicate that its going to be relatively loud anyway. (know how to tell there's a drummer at your door?.....The knocking gets louder and faster!) The drummer also makes a simple mix more difficult. The use of wireless shouldn't be of any concern. Like different mic's, each will have a different volume when on the same mark on the mix board, just learn the 'signature' of each mic and set your board hotter or cooler for each. The only variable there should be the charg on the battery and the battery's ability to hold a steady constant output. Avoid cheap wireless mic's, the battery packs are usually poor quality and may even fluctuate during use. Again, a soundman would be great for handling such a diverse group of instruments, voices and electronics. If a soundman is out of the question, then perhaps standardizing mic's and systems would give you a better chance of doig quadruple duty as a vocal, guitr, banjo, and mixdown. Sounds like you've been too busy! pk