Go to Blizzard Beach first thing in the AM - stay untill 3 pm - go back to your resort - change/relax and head to the Park for your dinner - have an ADR for dinner to make sure you have a place to eat and not wait long.
I would say you could do it. However, I would get to BB early (it fills to capacity quickly in the summer months anyway) and leave by 3pm, go back to your resort change and head out to dinner. I would give myself AT LEAST 2 hours in between leaving BB and making ADRs inside a park.
I agree, you could definately do it. I would make sure I got to Blizzard Beach as soon as you can.(Maybe EMH??) You can "get through" the park pretty quick and even leave by 1 or 2pm to catch a rest then shower before the other park!! Have fun!
We did this on our last trip with my 6yo DS. Spent the morning at BB, then met family at Epcot. We meandered our way to UK, where we had dinner on the balcony and watched Illuminations. It was a great day!
We did this with DD6 and DD3, although it was Typhoon Lagoon then Princess Dinner at Akershus. We left TL at about 3 o'clock to get ready for the dinner. We ate and then walked around the WS. We would have watched Illuminations but a flood started at 9 p.m. on the dot. We were tired so we ran to the buses.