Well, I would go ahead and take it. Is it VHS-C? If it's a big, full-size VHS one, I probably wouldn't, but the VHS-C is doable (we're still using ours). Esp for first trip with a 5-yr-old, it will be fun to have some of the character encounters, and to capture her reactions after various experiences -- ask her questions and try to get them on tape; also do an adult "journal" about what you all liked during the day. Don't bother much with taping the rides (you can buy other people's DVDs of those, that will be better). You won't want to take it every day, but it will be fun to have some video record of the trip. I don't watch our tapes very often, but enjoy them when I do, esp. just before the next trip.
K. Safari is pretty bumpy and doesn't videotape very well.
Remember the battery charger and charge up each night, and a few extra tapes (one a day is more than enough, if VHS-C, for just some highlights). I wish we had more footage of the exteriors and walkways, rather than the inside of rides and parades.
We've even left ours inobtrusively in the stroller and it's been fine (you will want to have a stroller with a 5 yo). Of course, if it gets swiped (unlikely), you'll have an excuse to get a new one!!!
Rather than regret not having it along, it's better to take it and try it a couple of days, then just leave it in room if it's not working out for you. But, for 5 yo first visit, I don't think you'll regret having it along.