Depending on whether the load cells will be permanently installed or are part of a tour that requires frequent assembly/disassembly you may prefer a wireless system over a wired one. A wired system would not require that each load cell be battery powered but it would be disadvantageous should frequent disassembly be required. A wireless system would be supremely flexible and easy to handle, the downside would be that the batteries in each load cell would need to be replaced every so often. A combination of wired and wireless load cells is ideal for some applications.