Alan, anytime I'm doing a live digital recording I allow for an awful lot of headroom, just in case. If these are being broadcast live, the remote truck people are likely doing the same.
If I'm recording a mono source with a two track recorder(say, a voiceover), I always record one channel at a level that I believe will peak at zero...and the other channel 8~12 dB down from that to cover my bases. Usually I can use the hotter channel (with the better S/N) but at least I've got the second channel to draw from if I need it!
