It depends on what you're getting but I don't think it's excessive, ours was about that and we had 66 guests but that included all ceremony decor, personal floral, 8 large centerpieces, linens, chairs, dessert party centerpieces, etc. Keep in mind that with 60 guests you have at least 6 tables, possibly more depending on how you seat them, we had 8 tables. If you are talking about large centerpieces, those can be very pricey. We did use some outside vendors which I think got us a lot more for the money, but since you are using a theme park location you have to use Disney.
Some ways to save, try to reuse decor, we used the same decor for the ceremony and reception, and the pre-reception and the dessert party instead of using different things for everything. If you're flexible with the flowers it could cut the cost a little as well since some flowers are more expensive. Or use centerpieces that have little to no floral, like lamps or palm leaves in a vase.