Preppers out of necessity need to develop these relationships now while we have the time and freedom to do so. When push comes to shove we won't have to start from scratch as we will have a working network to draw from.
I happen to have a dump trailer and pickup truck. I know a guy that has a large track backhoe and makes his living tearing out trees, knocking down buildings and digging holes. I have done some favors for him so when he had a grove of trees to take out he told me to come out and get all I wanted. I have another friend who has chain saws and a saw mill. Putting that all together we got about 100 cords of firewood in two days. Plus the bigger logs will be made into lumber on the mill. Cost to us was our time and fuel for the equipment.
Getting logs helps if you have a pickup truck and a dump trailer. Get em home and then take your time to cut and split. It is a very good feeling to know that you have enough firewood to get you through five winters or more. Plus around here it is easy to sell firewood. I am betting it might be a good barter item when things get tight.