i had left work one night (usually, i'm there for the fireworks, but not this particular night). i'd parked in the secondary employee lot (which is basically just the bottom floor of the main guest parking lot). after work that night, i stopped at a gas station, but i can't remember where. the fireworks started and let me tell you, i must have been right next to where they shoot them off because they were right above the trees across the street and MUCH louder than in the park, but i could watch basically the entire show. except that i'd been working and wanted to go home.
i know that doesn't help, but if you have time to drive around one day, maybe you can find that gas station?