I love TTD and it sucks that it's closed for the season. I would understand wanting to put off the visit, but you still got MF, Maverick, and SV. SV is worth the visit alone. I'm sure your husband will still have fun want want to go back.
KI is my second favorite park behind CP. KI has a good coaster collection, good operations, and is aesthetically pleasing. It's definitely worth a visit.
Mystic Timbers is great and it's one of my favorite wooden coasters. It feels much faster than it is, strong laterals, nice pops of air, and smooth. Really good during the day and even better at night. I think you'll be pleasantly surprised.
I love The Beast. It's one of my favorite wooden coasters and my favorite at KI. It's more about speed and feeling out of control. Not much airtime to speak of. The helix is one of my favorite moments on a coaster and is lateral bliss. The Beast is a better experience at night and it's my favorite night ride. I would say go in with moderate expectations.