ADR: LTT or WCC for lunch?

[Shepherdess]

I am going in August with my 60-something parents and 5 kids (14, 12, 10, 8, 6). I have an ADR for WCC for lunch on our MK day. I am thinking about switching that to LTT to avoid the hassle of getting out to WL. We will head back to POR after lunch for that afternoon break Any thoughts?

Also, we are currently scheduled for the Illuminations International Dinner Grand Gathering at Epcot. This requires 2 TS credits. Anyone have any thoughts if this would be worth using 2 TS credits?

Thanks so much.