I did a fair bit of reading on this topic, and found this article / video to be the most thorough:
Our Epcot day was 12/23 - we did have an ADR for La Hacienda, but ditched it since we were still full from our lunch ADR. We then decided to go with the front view, i.e. camped out at World Showcase Plaza. This gives you the view of the main Stargate and two tacos.
The benches up front were already taken, so plan B was to leverage a similar tip I’ve seen for MK fireworks, i.e. we stood a little bit back, by the fences for the landscaping. This allowed us to stand on the curb for a little extra height.
Our spot was next to a trashcan. You could also leverage the trashcan for the littles if needed 
