Jason is right about everything he says. As Reb said when the deal is sealed and you've helped the owner for a few days then write up a formal permission and ask him to sign it to be carried around when you hunt.
If he land is big enough and there is swamps, coniferous and deciduous trees, a stream, hills, bush, apple trees, corn, etc then you only need one place. Do some research, some land owners have land all over the place. Where I hunt, one land owner has about 6 areas that are huntable.