5. Do your local area research
Events going on around your wedding affect the wedding itself. Is there anything that'll push up prices in the area? Is the city hosting any kind of festival, sporting event, parade, or big concert? Hotels push up prices (and book up early) when there are special events in town. You may have your heart set on a specific weekend, but if all the rooms nearby are booked up because of a big event, you're risking your guests being unable to attend.
6. A bank holiday weekend might not be the perfect time to wed
Similar to the above, bank holidays can cause unexpected issues, especially the ones in peak wedding season: Easter, May Day, and the last weekend of August. It's more expensive and busier to travel at these times, and they're also popular times for people to book holidays and mini breaks. A lot of couples choose bank holidays because they're convenient: fewer people involved in the wedding will need to book extra days off work, even if travel is involved. But this could mean some family or friends might have to choose between multiple weddings if everyone has the same idea!