I am usually travelling to
Disneyland rather than WDW (much closer) and instead of Disney Visa, I use an airline visa to earn miles. When we go, we either get a really awesome airfare sale (right now it is $50 each way from where we live), or we buy one ticket at full price (usually around $200 round trip), buy one with the $50 companion ticket (now up to $99, so not as good), and use miles for the other two. So plane ticklet are usually around $300-$400 for the four of us. We put everything possible on the card (but we pay it off every month).
We do rent a car, which is about $150, but we buy out park tickets through
AAA, which offers free parking at Disneyland. We also make sure to travel off season because it is less crowded and there are often ticket deals. We usually go in January or February and it seems like they are almost always having the adult ticket at kid prices. Tickets are usually $169 x 4, so $676.
We are timeshare owners, so we stay at a timeshare when we are there. The equivilant in dues for the week is $400-$700 (depending on if we stay at the nice one or the skanky one), although dues are paid throughout the year, so it seems like we are staying for "free."
Since we have a car and a full kitchen in the condo, we go grocery shopping. We eat breakfast in our room, usually pack a lunch, and often come back to the room for naps or share a meal in the park. We often don't eat a meal in the park, but if we do, it is only one per day.
We do splurge and make sure to do at least one character meal each trip (often two) and I think the Bibbity Bobbity Boutique is now a tradition, after how fun it was last time.
We don't really buy souviners. I give the kids $20 in Disney dollars before we go, and they have money that they save from birthdays and whatnot if they want to buy something. My husband would never buy a souviner and I usually don't. We might splurge on a dole whip or turkey leg at some point, but usually one to share and one per trip. We are very cheap!
So, our trips are about $2000 and we go once per calendar year.