We have a similar program here in Ohio. In my county we are lightly populated and deer heavy. In other words I can get several per year if I want to.
There is no substitute for experience. You will learn as you go and you will learn a lot.
I find that most of the roadkills happen at night. Often early evening or early morning. It's dark, and that is when people who still work are on their way to or from work. So get yourself a good flashlight. I find that it is better for me to take the whole deer home without field dressing. It is not very safe to try to field dress along a dark road with traffic going by.
You can learn very quickly how to do the butchering yourself without the added expense. Practice, there is no substitute for the experience. See if you can find someone to show you how for half of the meat. A couple of times of this and you will not need much help.
Prepare yourself for a "hard hit" deer. Sometimes they get hit very hard and there is a lot of damage. You will need to learn how to cut out sections that are not fit to use. Some people have dogs that know what to do with the scraps. I have chickens that try hard too.
In my county I find that a lot of people who are on the list do not want to go out at night. Some do not want to go in bad weather. These are the times when the deer are hit, so I try to be reasonable and go as often as I can. My main problem is that I often am short on freezer space. This takes extra planning.