I don't like having a bag on my back. Too easy for someone to open and ... you know ...
I always wear a fanny pack. It's small, and it helps keep things to the bare park essential.
Fanny packs don't make me laugh because they're akward. What makes me laugh are some guests with large backpack and who look like they set up camp for the night, getting everything out of the bag, whenever they want to fetch something inside that botomless pit...
Now, regarding Universal. Most rides will require you to put your belongings in the locker.
On Men In Black Alien Attack for example, which is nothing more than a glorified Buzz Lightyear's Laser Blast, you need to stash everything into the lockers. You're not allowed to bring any item that does not fit in your pockets. (I was turned away at the load area because I had my DSLR around my neck. I had to get out of the ride, use the locker and come back (thanks for the unlimited express btw

)
a word of advice, always keep some cash in your pockets.
Lockers at universal are free for a period of time based on the standby line wait time. But those times are manually entered by Team Members. Sometimes you will spend more time waiting and doing the ride than you get for free for the locker. And you'll need to pay a few bucks to get your stuff back ... well ... what if your cash is all inside the locker ?...
