1. The Popeye's Water Ride: you will get completely and inequivocally soaked. Everything, shoes included. There is no way to "get lucky" on the ride. Water is dumped on your head.
2. At universal you park in the same garage for both parks. For a couple of bucks more you can get preferred parking for less walking. Ask for it at the gate.
3. CityWalk is the area that is between both parks. It has tons of places to eat and shop if you can't find what you are looking for at the park.
4. Tons of places to eat and to also sit down and relax. Way more than say the magic kingdom.
5. There are several rides which will not allow you to take on a purse or a backpack. There are free lockers available near the ride for your use for that.
6. You can buy an Express pass that gets you to the front of the line for most rides (But not forbidden journey.) Its wonderful and well worth the money. We were able to do all the major rides in BOTH parks in one day using it.
7. If you are staying at a universal resort your don't need to buy an express pass. Just show your room key and get in the express line.
8. Fart jokes, the crushing of tinkerbell etc occur. They play rock music all over the parks, sell alcohol and make fun of disney in more than one show. Rides are way more extreme. There are many less strollers to negotiate around. This is not Disney. Go understanding this and enjoy!