How many are acceptable?
A few per day of the holiday
A single post of a certain number per weekend or week
If you don't share your holiday snaps, why not?
I prefer to see my friends and family holidays snaps of where they have been and what they have done one as a matter of interest and two in case it's somewhere I'd also like to go.
I prefer to see all the snaps in one post with about 10-15 for a weekend and 15-25 for a week.