Le Cellier does not change the configuration of the tables between lunch and dinner, so regardless of the meal you go, the same issues of proximity to other diners exist. LC is inside Epcot, so the dress is much more casual (than other Signatures). You'll generally see folks in "theme park" attire, so in that sense it is much more casual. Likewise, there did seem to be more children present than at other Signatures. If your children are well behaved, then there should be no problem with them at LC. If your children are prone to being audibly fussy, then note that everyone in a three to four table radius will hear your child.