I'm a native RIer and if you're planning a trip here this summer, 2012, here are a few things you should know.
If looking for summer rentals in East Matunuck/Jerusalem/Snug Harbor, be aware that the facilities at East Matunuck Beach are currently under construction, and summer 2012 the facilities consist of Port-a-johns. In addition the parking lot is greatly reduced. Construction is excpected to be completed in fall 2012.
WaterFire is having a GREAT year scheduling sponsors. The best lightings are ALWAYS those that have ballroom events scheduled. This year early here in March we already have many scheduled. Usually in May we don't... so take a look at what we have so far in planning your trip