For the benefit of posterity...

run {
crosscheck backup completed before 'sysdate-30';
delete noprompt expired backup completed before 'sysdate-30';
}
exit;

Logging the output was a little screwey. The command line LOG didn't work at all, "spool log to" worked in the script, but .. and here's the weird part .. only AFTER the "exit;". If "spool log off" was before the "exit;", it created a 0 byte file.