MSC, I wouldn’t drop weights for another week man. You should still be good to recover as long as you really cut down volume about 7 days out.
I dont think 2-4 sets of weights in totality should fry your CNS that much. The most important thing to keep track of is your motivation during the workout. If you are going through your workout and you start to notice that you are dazing off and thinking about other things besides the workout, you are mentally tired or stale, and you might want to cut the workout there.
As long as you feel game to lift go ahead. Pay attention to your body this week and keep things intense and short. You should be ok to compete come within 14 days.
First, if you can find a good coach, get him to plan your workouts. (It is a much better solution in the long run).
Second, regarding hill sprints (more info can be found in CFTS and the GPP DVD, both of which are very good), i usually use them in conjunction with prone starts. This ussually flows in to starts and accelleration work. If you want more info, i am pretty sure this has been discussed before (and in the product mentionned above), the search engine function can be invaluable.