Well this morning with nothing better to do I revisited my trailer bearings. As posted above I changed out both bearing and the seal on the left side and left the right side for later. Like most times when you plan to get back to something there are always a thousand other things to do.

I removed my tire and then the hub assembly. Took everything over to the wash basin and cleaned up the bearings and the races. I saw no signs of problems with the bearings but when I looked over the races, I found that the inner race had some water corrosion stains on it. So I knocked out both races, washed out the hub, installed new races, packed the new bearings, installed the seal and reassembled back on trailer. Now I have new bearings and new tires on the trailer and I'm ready to go.
One note, to anyone who does his own like I did, remember you need to pack the bearings not just apply grease to the outside of the bearing. Grease has to be forced between the rollers and the cage that holds the roller in place. It's a messy job but simple. Put some grease into the palm of your hand and with the other drag the bearing across the grease forcing it into the bearing until it come out the top side. Here is a "you tube video" showing how to do it. I don't know what he is referring to by overpacking a bearing especially on a boat trailer. On an auto too much grease can cause problems.

https://www.youtube.com/watch?v=BhL1uAp_WCw

Picture of my inner race showing the corrosion stains cause by water. This is how it starts out and from here can rapidly get very bad.