I am JUST the wedding planner. That means I help brides and grooms choose venues, vendors and arrange logistics. The bride (and sometimes groom) choose the colors, the theme and the general spirit of the décor.
The proposal is going to make for a magical story that she'll be telling everyone for the rest of your lives. It's the moment those months of meticulous repins and reblogs change from fantasizing about the wedding to actually planning it openly.
I won't deny that all the new amazing apps and technology available have made many parts of the planning process easier and attending a wedding more enjoyable; however, wedding guests need to brush up on their social media manners before they ruin someone's special day.
You do not have to love hanging out with your future mother in law, and it's also okay to think your future sister in law is a piece of trash. But you should make the decision YOURSELF as to whether you love your fiancé enough to tolerate the baggage.
It is easy to be influenced by a professional, but this is your very special day, so make sure your requests are heard. Get what you want. But, to do so, you'll need to know what you want -- and that means you need to do your homework.