April is close, check first styles among photographers and than prices. You still have time to book for a photographer that get close to you espectations.
You need to think about location, ask to your photogapher about different options, notice that prices also change dependding on locations.
A TTD session nedds some production. Is like shootting the final of your own romantic movie, so think which photographer can be close to your idea.
During photo session your photographer will direct you to develope and capture this unic moment .
Good look in your search and congratulations for your upcoming wedding.