Jr.... I was thinking about your idea for 'Remote arrow change' (or maybe powering a conveyer system i was thinking about) and came across this device. There are some between 6-24v dc input, and different amperage relays, there are even some with more channels. What really does it for me on this is it has solder pads for Com, NC, NO. Plus it's 12v with a working voltage down to 3.7v
https://www.amazon.com/Wireless-Cont.../dp/B077ZQMQDZ
Tx is a remote fob like cars keyless entry, it could be fastened to your radio with Velcro, Lanyard, whatever.
Rx looks to be able to do latched or momentary switching. It's voltage range should give enough options like a RX pack, 9v batt, Stick pack, 2s lipo...