I got through yesterday from town to Mata Grande. It does help to know the road in advance so that you can pick the shallower sides of the big puddles. One other rider who made a poor choice ended up with a wet engine and a stalled cart.
I found the worst part to be behind Tres Banderas/Belizean Cove Estates, but there are plenty of other contenders for "worst" along the way.
Like the seemingly ALWAYS wet spot near Mata Grande where you have to tap dance along the conveniently laid piece of metal on the west side, to try and keep your feet dry?
Always fun on a bike.