I live very close to Homosassa Springs. There is also a nice beach if you have a vehicle. Head up 19 N to Fort Island Trail. Turn L on Fort Island Trail, and go about 9 miles until it dead ends into the beach.
Weeki Wachi is still open, but I am not sure what's there.
I haven't been to the Wildlife park in a few years, but the last time I did it was awesome!
If you like shopping at some historic shops, head N on 19 past 44 and turn right on Citrus Avenue in Crystal River. There are some really neat shops there. Antiques, books, garden, clothes shops come to mind. And there is a nice restaurant in that area called Cafe on the Avenue. It is in the back of one of the gift shops. If you continue further north on 19 (2 miles or so) there is a small mall.
In Crystal River, some good places to eat are Charlie's Fishhouse, Cody's Roadhouse, and Cravings on the water. There are also the standard Applebee's and Chili's too. Not much in Homosassa Springs that I would recommend. Except the restaurant that has the monkey island. You can sit by the window and watch the monkeys, and the food is not bad. That is in Old Homosassa, and I imagine they could tell you at the hotel how to get there.