I agree with Cecil 100%. My pond is still 40% ice covered and I saw 3'rats yesterday and I know they were all "relocated" by the end of last summer. I have the time and enjoy the "game" going after them myself.
To locate a trapper try
www.nationaltrappers.com Near the bottom of their web page there is a link "Join your state TA". That will take you to a list of all state trapping associations with contacts to their directors. They will be able to give you information on local trappers.
Good luck,
Dan