I think that's the right attitude. Realize you aren't going have some kind of drastic negative body composition changes from eating "normally" for a few days. Especially if you keep an eye on your total caloric intake. A lot of people actually break through plateaus on cheat days/vacations etc (you probably already know this). Best not to worry about these kinds of things.
It might be worth increasing your volume on your Friday/Sat workouts, maybe toss in a few other non-back/tri exercises if you like, since I assume you won't be working out Mon-Wed.
As to my shoulder issue, I'm honestly not really sure. Haven't really played around with it much, just resigned myself to the idea that incline is a bad idea for me.
I could only speculate as to the cause. I did injure both of my shoulders a decent amount when I was 16-18ish. Something like lvl 2 sprains on both ACs and severe strain of rotator cuff. Could be somehow related to that, but I suspect not. As I recall, it's only barbell incline which has the effect on me. However, even putting my hands in the air right now in a barbell incline path makes the clicking and popping sounds in the shoulder.
It doesn't hurt at first, but if I just ignore it and power through the clicking, I've hurt my shoulder (couple days off from overhead pressing in the gym level of hurt). I remember a while back I did 3 sets of 3 reps on incline, at roughly a 3 rep max. The first set was clickity clacking etc quite a bit but didn't hurt. After the second set, I had some residual pain, sort of a muscle soreness/tightness pain. Then after the third set, which was a real grinder, significant muscle soreness/tightness pain, followed by sort of sporadic acute pain when moving the arm in seemingly random patterns. Particularly painful when I'd do a backwards windmill, where the arm sort of clicks at the top as it moves past vertical. Anyways, as I said, healed fine in few days to a week. Didn't even prevent me from benching 2 days later.
I've always been somewhat prone to shoulder injury. Could just be something related to a muscle imbalance or tightness because I do know that I'm extremely shoulder dominant. Front delts are quite large in comparison with rest of my shoulder, my military/close grip is quite high considering my bench, etc.
One other possibility I've read about sparingly is that there's some sort of bone spur in my shoulder(s) which rubs on/cuts the rotator cuff when I incline bench. Hopefully not though!
Anyways, I've gone on quite a bit, and it is your log afterall... lol