Excuse me, I do not have hotels by the sea to indicate.

Between about 10-12 and about 2-4 I can’t remember exactly. The times were slightly different from the guide book we had so it’s worth checking beforehand. There’s a board outside the chapel. If you get there with little time to spare go straight up the stairs to the right as it’s in the upper chapel. You can go in the lower one as well.

Definitely no flash allowed and as far as I could tell you would not be able to take any photos at all of the holy vial itself

The visitbruges.be website states that the veneration of the relic happens daily between 11:30am-12:00pm and 2:00pm-4:00pm.

В 11.00 точно, на 15 минут достанут коробочку с лоскутом, на котором капля крови Христа. но каждый ли день или нет - уточните

There is no fee to get in the church, but a small fee for the museum. There was no queue when I went, afternoon on a Saturday...

I was just there last month and as my hotel was around the corner an early morning visit was great about 9am. Visit the relics room, small but very beautiful. If you have not chosen a hotel and need one. Grand Hotel Casselbergh is fantastic and very centrally located. Happy Travels!

No. There was no fee. You can make a donation but there is no compulsion. The church is beautiful. Enjoy.