Make up some cards with your contact info on them. Take a clipboard with some catch pics on the top and a tablet to take thier info. Once you get one of thier neighbors names on it, it becomes easier. Ask them if they have problems with raccoons, almost everyone has. That gets you on the ground. Creating a relationship with those landowners keeps you on it. Once you gain permission become an asset to them any way you can. Explain your time frame in mind to trap property and stick to it. By telling a landowner you will, for example, be there for 2weeks it helps them say yes to knowing you won't be there for 3 months.
Good luck.