It definitely looks like dates are selling out quickly for upcoming months. I believe it is refundable with 48 hours notice so I would probably book if I thought I might want to do it. They seem to be raising prices for the tour as well, so I doubt it will get cheaper.
UT has a sizable discount (saves a little more than tax) but I believe only refunds 95% with 48 hours notice.
Are you doing more than 1 day at
Epic? I am planning to do a VIP tour since I am only doing one day. Express looks to be half the cost of the VIP tour for that week, so if you are doing two days, maybe 1 day of express and 1 day without to just focus on shows, food, atmosphere, and a few rides could be a more cost-conscious plan.