You can watch the MK fireworks (but not the projections) from CG, or NArcoosees. Or the decks / beaches of most MK resorts. Then there are dessert parties for seeing all of it.
There is one dining package for the EPCOT fireworks, at Rose and Crown, but views can be had from other places on the lake I believe. Then there is the Frozen dessert party, including fireworks viewing and a ride on FEA.
At HS and AK, I believe the light shows are shows, and need entrance. (You can get a dining package, or FP, but I believe neither are *necessary*)