I have done some basic research such as buying wedding magazine, online forums, online website, sending email for their package price, when attending friend's wedding - take extra look and also took photographs of their gowns and their every about wedding for future reference ... etc
However, I have signed up the package (Pre-Wedding or AD package via road show and being "direct" to the shop when passby ...
I have tried the TW Pre-Wedding shoot, no regret ... nice pics ... but yet to try AD package yet with another local BS.
With the help of my research, I am able to bargain and ask for freebies to add in the package.
And also it is important to know what other people outside offer, so that you could firmly bargain with the BS.