PTP:
I have brand new springs/bearings/hubs/tires (12) that were installed about 6 months ago and I have maybe trailered 100 miles since. Do I need to do anything to the bearings before a long trip?
Its not so much the mileage (minimal in your case), but how many times have they been SUBMERGED IN WATER at the boat ramp, DEEP puddles, etc. during those 6 months? Axle grease is water RESISTANT, to a point, but if water STAYS in there, the churning at 80MPH will eventually cause the soap-base of the grease to "mayonnaise" and break-down... then, the "bad thing" happens... almost always at a very inconvenient--and even dangerous--time and place.
You're probably fine, but hey, pump some MORE grease in there and CHECK closely if the overflow that oozes out is grease... or WATER? Even if they have NOT been dunked during that period, if you live in a humid climate, there's condensation too...
