Hi Cliff,
Its what I did in training before getting inside 40 mins for my first 10K. I got 39:38 at the time.
With the mile reps, I must admit I walked a few paces after finishing each rep and just generally kept loose. At the point of finishing each rep I'd check where the analogue hand was on my watch and just catch my breath whilst moving. Some swear by jogging recoveries, its just not what I do.....
Ah, last week before the race. Do the 4 mile time trial seven days before the race, I personally wouldn't do anything the day after. 4 miles at race pace is a tough session.
But in the final 5 days I'd keep most running at around two thirds of what you'd been doing in previous weeks, no hard sessions, speed sessions or tempo runs. I might do a few race pace half mile reps a few days before the race (maybe six, with 1:30 recoveries). This just as pace practicing, so that you are familiar with your chosen pace and don't go off too quick or slow on the day.
I almost always take the day before a race off. I have been known to do a few miles of slow running, but nothing much. Others swear by a session of strides the day before.....but I don't.
Let us know how you get on, I'd be delighted for you to get inside 40.