Thanks to Sammie, Tigger_Magic, ScubaMouse, and DisneyWisher for your quick responses!
Sammie Yes, I know the EWP goes past WL, but Im not sure how late DS (20 months) will last, and I think its even later on
MVMCP nights when the fireworks are later

. Well be at Poly that first night (and it should feel an hour earlier to us, though travel tired), so I thought wed try to catch it there, and then if we get to see it another night from WL, so much the better!
Tigger_Magic Thanks I agree taking the monorail all the way around and back to Poly the 2nd time sounds like the best plan, if we get there early enough, and hopefully well catch the front car at least once during our trip! We can fill time by riding again after dinner (or else maybe play in the sand or shop?) We can either try the monorail or walking back to TTC after fireworks/EWP.
ScubaMouse I know! Ive read lots of trip reports with young kids saying their favorite things were the monorail and swimming at the hotel!
DisneyWisher Yes, Monday is our arrival day and Ohana dinner!

We aren't doing any parks that day. We do plan to take the boat to MK when going to MK from WL, but Im worried about getting back home to WL from the Poly with a toddler after fireworks and EWP when I imagine the boats and monorails to be mobbed, especially our first night when we don't have the hang of everything yet.
Sorry for kind of hijacking this thread!