I go alone most of the time, all I would say is be confident but don't be stupid.
Make sure you net up all the holes, once you have checked once, check again, and then once more to be sure.
And don't work any warrens that you aren't comfortable doing alone, just tell whoever gave the permission 1st and that way more than likely he will respect you more for being honest.
Have fun out ferreting mate,
JoeD