When I moved to our property on Farm To Market Road in Whitefish, MT, I chose to build a deer-proof fence to last 100 years. Though there is a path around the outside liberally sprinkled with deer dropping, no deer have gotten in for the past seven years. And I did it all myself.
1. Dig holes 2-3 feet deep (to frost line) at the corners of your garden, and one extra for a gatepost.
2. Mix cement as directed on the package with sand and gravel.
3. Insert the iron pipe into the holes, plumb with a strong and plumb bob.
4. Fill with cement mixture and let set for a couple of days.
5. Run a string between your posts and measure every 8 to 10 feet for placement of T-bars.
6. Pound the T-bars for a 2-foot depth, in line between the iron posts (I stood on the truck cab to do this).
7. Cut vertical cross wires out of two feet of the end of your field fencing.