Did you happen to see that lead on the Belize Forums for a church in Dangriga?
If you don't need to be on the water you could go someplace like http://www.mamanoots.com/
I have been there for a visit by car. Looks good. We just have always prefered being on the water.
They may guide you in the direction you are looking
It's still not a biking distance to Dangriga though.
The road down to Mama Noots is a long dirt road off from the main road.
There are many options.
Water side try Tipple Tree Baya, Three Sisters, Hopkins Inn. None of which we go since we want a different type of vaca. More on the upper level of cost. I have not even seen the above mentioned but I am sure many folks will jump in that may have. More likely to get those results in the Belize Forum in a search
Whatever you decide.. ENJOY