That's a difficult questions to answer.
I don't generally budget but often when I bring someone with me (such as my goddaughter or my cousin) I try to help them come up with a budget.
The first thing I ask is, who are you buying for?
If you are planning on bringing even "a little something" home for people, how many people and what are you planning to spend - $5 each, $10 each, $20, $50? There are few bargains at Disney - if you want to bring home something for everyone, you need to budget more money.
I'd plan at least $100 for yourself. You'd be surprised at what you'll find. And if you don't spend it, it can go for your next trip.
Remember to look at what your other out of pocket expenses might be. Tips are not included on the dxddp. On the dxddp you get two snacks per person per day so you should be pretty well covered on the food part of the festival. Are you planning on drinking alcohol? I budget $10 per drink because I like fancier drinks (grey goose slush, Peach Snap, magical star cocktail). Some are a little more, some a little less so it works out in the end. I estimate the number of drinks I can handle and then multiply things out from there.
At the end of the day, I always have my credit card ready and able. I still kick myself from a trip I took when I was 18 (many moons ago). I was in the MK with a friend and saw this silver candle holder. It was more than I wanted to spend so I want to "think about it". We never got back to that store so I didn't get it. I regret it. I really did want it but I let my cheapness stop me.
