I usually do three total body workouts a week. We only practice two days a week though. I asked Coach Staley a similar question during a conference call and his response as far as what kind of workouts to do in season was this. Work up to a set or two of low reps with a "training max" (~80-85% of 1RM). So if you were doing total body workouts, you would have your six movements and for each one you would do a couple warm up sets and work up to a set or two of singles, doubles, or triples with your training max. You would also want to keep bar speed as high as possible I'm sure.
I think that would be the way to go for you since you have training 5 days a week.
On a side note, down in Florida the fall season was only regional cup action. The real USA Rugby season was in the spring. Is it different up north?