Anywhere is great honestly, but I really recommend getting to the park early to grab a fastpass for each person in your party, its just like fastpass for World Of Color (it doesn't effect the rest of the day for ride fastpasses). There is 2 Fantasmic Dinner packages which gives guests a designated priority seating in the front and the sides next to the dinner packages are fastpass and what is left after that is standby and usually its very limited viewing (some people wait HOURS before because its so popular especially now that they have updated it.)
The fastpass kiosk is located across from the Golden Horseshoe right by Rivers of America.