When ya going? I assume that you know that Mount Dora is well known for their antique stores.
Events:
Art Stroll, May 8th
Blues N Groove Music Festival, May 15-16 :
http://bluesandgroove.com/
Restaurant: caveat, I haven't been in several years though. Check recent reviews.
Goblin Market:
http://thegoblinmarketrestaurant.com/
Quaint, intimate, former house. Not cheap.
Lodging and Food:
Lakeside Inn -
http://www.lakeside-inn.com/about-us/ Historic Inn with a couple restaurants that used to be good. Check recent reviews though.
I am not a fan of the Mission Inn Resort in Howey In The Hills, but others love it.
http://www.missioninnresort.com/