My DH doesn't go on our WDW trips with us. I've taken my kids (5 of them) by myself several times...once we even brought a friend with. It was great.
One time, my DH came down for about 4 days of our vacation. He just isn't a Disney guy. But bless his heart...he works hard at extra jobs to earn $$ to send me and the kids, so I'm not complaining.
Besides, he's a teacher, and the only time he can get off is over the busy season. We ALWAYS use frequent flyer miles, and they aren't available during those times. Plus, we go during Value Season.
Our next trip in January '09, however, my two oldest boys aren't coming. One has college, and the other has sports. It will be weird to be a family of 4 for once!
It's funny...my DH is a very frugal man (that's one reason I've been able to stay home all these years.) But when we're at Disney, I do splurge a bit with the kids. Those 4 days he was down, it was back to frugality...splitting french fry orders, and my least favorite...splitting drinks...ugh! He didn't mention until a day AFTER sharing drinks with my oldest daughter that he had the flu before he came down. Of course, she spent the last few days at Disney with the flu...poor thing.
We "never" split drinks there...ever. But if he's not there, it does take some of that stress off.