We enjoyed our stay at Rodolfo's (Rudy's). The place is just as it looks in the pictures The room was perfect for us, with a nice shower and lots of hot water. Rudy invited us to have coffee with him on the second floor balcony of his house, and this was very enjoyable.
Corozol is safe and friendly. There are several available day trips as well as things to do close to town. We walked to the Santa Rita Mayan ruins and had a good guide, Ramon. We also took a tour of the expat communities of Consejo Shores and Smuggler's Den, eight miles north of town. Rudy arranged a taxi for us, and the driver was very informed. Go to the Culture Center to see some old photographs and get a walking guide of the town.
We took a day trip to Orange Walk and the Lamanai Ruins. We took a bus to Orange Walk that then continued on to Belize City and left us off at the dock for the boat down the New River to the ruins. The total trip to the ruins and back was about 5 1/2 hours. We then caught a bus on the highway (they come frequently) that took us back to Corozal. The company we went with was Reyes.
There are a couple of other day trips that we didn't have time to look into. Rudy could probably help you with these. One is to Sarteneja. You can get there by bus (twice/day, I think) or on the water taxi that goes to Ambergris Caye. It looks like an interesting place and I'm sorry we didn't go there. Another possibility is a visit to the large Mennonite settlement of Shipyard that is near Orange Walk. I don't have information about this, but it is mentioned in a tourism book that we picked up in Orange Walk.
Good restaurants include Scotty's, Copper Seahorse, Corozo Blue's, and one right on the water to the south of Rudy's whose name I can't remember. At Corozo Blue's, I had the best Caye Lime pie I have ever had anywhere. Service there was slow, though, so maybe ask about this before you order.
Whatever you do, enjoy yourselves!