I would tell you to tread lightly. You asking for a favor. If they don't want to do it then don't force the issue or complain. If one shift doesn't want to do it, then try another shift. The best bet (best results for me anyway) is to find a chief officer and ask him/her. Then they can give the stations a heads up before I get there and they usually do what I ask because they talked to the boss first.
Jason Knecht
Fire Inspector
Township Fire Dept., Inc.
Eau Claire, WI
Fire Inspector
Township Fire Dept., Inc.
Eau Claire, WI