Yea I doubt they will feel any withdrawals, other than maybe a little restless legs, and a little sleep trouble for a night or two.
OP, don't be expecting withdrawal or hyping it up. A lot of withdrawal is mental. I just kicked a long habit (well I'm on day 5 of withdrawal so almost over) and keeping busy is what helped the most. Yesterday morning I was laying around feeling shitty, thinking about all my symptoms, etc, and then I got up and did yard work, cleaned my room, did laundry, and I felt so much better. I had been using mostly 3-4 days a week since August, and my lowest dose was usually 60mg of oxycodone or 1 bag of heroin, so you should be fine.
Just go about yours after your last pills like they are any other days. As a precaution, I would recommend taking your last dose on a Thursday, so that if you feel any withdrawal it will be over the weekend (the peak is usually 3 days after you last dose). That is of course unless you work weekends, in which case try to plan it out differently to accomodate your schedule.