I googled lodging near Boston, MA and checked out the expedia.com website. It is a good way to see what's there and compare peoples comments on various places. I was surprised to see a very low price for the Boston Park Plaza which is in downtown Boston. Those listings would also give you amenities such as a shuttle to the airport. If you see something you like go directly to their own website to check out the prices there as they can be less than expedia.
Dress warmly as early April can be chilly especially as Boston is on the water and windy. If you're into science go to the science museum. The top of the Prudential building is a good place to get a bird's eye view of the countryside.
I hope you all enjoy your trip.