Well, honestly, I rarely find much to buy at Universal Studios besides Back to the Future trinkets. It's a lot different than shopping at Disney... I want to buy most everything I come across at wdw. Souvenir sales are a huge part of their profit. Universal's souvenirs don't appeal in the same way (I believe this is because there is no Mickey. Sure, they have licensing benefits to Nickelodeon characters [I'm not a big Nick fan], but none of those have gained the popularitity of the mouse.).
Anyway, I don't find it difficult to resist the spending temptation at Uni, but the "bring all you can spend theory"
sounds like a plan.