Yeah i had another cool idea for those who cant afford fancy radios or dosent want to rely on electronics due to terrain or what ever... i think me and my group are going to start paracticing communicating with animal calls... more then likely the best one to use in my area would be a coyote call.. you can carry one call to make all sorts of different coyote sounds.. just memorize what howls and barks mean what. the call can be heard over great distances and you may even be able to lure in your hungry enemy to see where them damn coyotes are at.
and somehting like a quail call can be used for quieter needs.
i swear i made a thread on this already but i cant find it so maybe i dreamed that i did.