I'm concerned about external noise pickup too. 10m of cable will pick up main AC noise in the bench environment, at the very least. That’s within the band of my sought signal. In principle, I could create a “difference of sums [for lack of a better term]” op-amp. I could make each individual sensor output a differential signal, and connect them into a common differential twisted pair.

For common-mode e-field, you need to consider all sources are unbalanced but fortunately low impedance. If necessary use a TIA with a current loop into a remote termination R=100.

STP wire will help lower ingress with the shield terminate at one end only to avoid unintended ground loops.

A CM choke will help if you can find one in the >1H range to raise the CM impedance. It may look like a 1:1 transformer.

Filters may also be necessary to match your signal BW down to the resolution required. e.g. -40 dB BW for other transient interference.

It all depends on what SNR is required.