Dining Plan on Split Stay

I have a RO on first stay n a FD package on 2nd stay. If I add dining plan to RO, can I still use my remaining credits on the day I check out 1st stay/check in 2nd stay? How do I use it in the park since I would have 2 MB? Do I simply bring the first MB into park? TIA

The two reservations would be separate. Think of them that way. With DP you can use it until midnight on day of checkout. That wouldn't change.

As far as MBs if you put both stays on your MDE account then both will show up/work for both reservations. Your magic band is like a key - it doesn't hold the actual info