Your family has to understand that you have taken an incredible job that has some sacrifices involved. You may be able to make the wedding, you may be able to make part of the wedding, you may miss it entirely.

Schedule for July comes out mid June. You will have a better idea then. There are some small workarounds that make it more likely, but no guarantees.

The chief pilots are good about getting people off for births, deaths, etc but a week in the middle of high season for a wedding - let alone not your own - no real way to promise that can happen.