We've lost count of the number of times we've been to Disney in the past 20+ years, so I can reinforce a couple of the other tips and add a few of my own:

- The Unofficial Guide is an excellent reference. Look for an older copy at a greatly discounted price - not that much will have changed. Otherwise it's a pricey book.

- Shuttles to the park are an issue at the two hotels you are comparing. Shuttle service at the Hilton is provided by Disney, just as if you were a guest at one of their on-site hotels. As a result they run almost continuously. The ES LBV OTOH has set times for their shuttles - they hand you a list at check-in. There are far fewer and they run at set times, making you a slave to their schedule. This can be an issue if you need to return to your hotel because you forgot something, want to have a meal outside the part or take an afternoon swim, returning for dinner in the evening.

- Whatever park you go to, by all means make a dinner reservation. My family took me to Alfredo's in Epcot for my birthday last Saturday, reserving early that morning. Good thing - the place was packed and the standby wait exceeded two hours. All Disney restaurants have children's menus, usually themed to the adult menu. You didn't mention the ages of your children, but if they're small and you're looking for entertainment value, the Japanese restaurant in Epcot can't be beat. The revolving restaurant (frequently renamed) in The Land pavilion is very family-oriented; "Mom's Primetime Diner" or something like that in MGM Studios is also high on our list for repeat visits - huge portions and very entertaining. The are also 2 Rainforest Cafes - one in Animal Kingdom and the other in DT Disney, along with one of the better Planet Hollywoods in the chain.

- Take lots of sunscreen and water. Both are very expensive in the parks.

Please don't hesitate to ask more questions or email if you wish.