Travel Question

Good Day,
My family of 4 will be in Tokyo after Christmas over New Years. What pass is the best Option?

Arrive day 1 - Narita to Hilton Tokyo Bay
Day 2 - Local Disney
Day 3 - Hilton Tokyo Bay to Nagano (Yamanouchi)
Day 4 - Local Nagano
Day 5 - Nagano (Yamanouchi) to Hilton Tokyo (Near Shinjuku)
Day 6- Local touring
Day 7 - Local touring
Day 8 - Hilton Tokyo to Narita

From my research I was thinking the JR Regional East Pass (7 Day) starting on Day 2. This gets me to and from Nagano and then back to Narita Airport. Is this the best option? Does the regional pass not have the Green Seats? Will I be able to use this pass leaving Disney to get to the Shinkansen train to Nagno? Thank you.