Some tips on looking for room for 2 adults and kids:

1) Like I said above, go for hotels with suite as standard room with sofa bed. When the kids wake up at 5am, they still have their own room to play and a door between you and them!

2) Many hotels have a few cribs available for guests with infant. You just have to call housekeeping to ask for one.

3) Most hotels would also let you add a bed in the room, but they will probably charge you for it though.

4) Some hotels, like Embassy Suites, would let all the guests eat free breakfast. Some others will have kids eat free.

5) When you search on Hilton site, don't put in 2 adults and X children for the search. Many hotels won't show up if you put in more than 2 adults per room. It is possible that the hotel didn't show up for 2+2 because it only has King bed room available, but it didn't take into the fact that it also has sofa bed.