Wheel Bearings Bone Dry from Factory

I have a 2021 Sonic Lite 169VMK and doing maintenance for this camping season. I expected the wheel bearings to be packed with grease from the factory but when I decided to pump new lithium grease to purge the factory grease out, I was shocked that there were no grease being purged as the new grease was pumped in. Both wheel bearings were bone dry!

My SL169VMK has about 3300 miles on it. There is no grinding noise as I spun the tires. What risks do I have running these bearings on new grease? Heading out on a 400 mile round trip this coming week.