Scott, my new camper has the wet bolts. I've greased them twice since getting the coach back in July.
In all my 40 years of dealing with rotating machinery, the idea of a bushing called "neverfail" causes me to immediately think "oxymoron". Maybe they mean neverfail as long as you trade it in within five years.
I like the wetbolt system. When I rotate the tires, it's a perfect opportunity to put a shot of grease in the pins.
2016 Ford F-350 Lariat CC, 4x4 SRW. B&W turnover with extender. 2015 CC Silverback 29RE, fitted with Reese Goose Box. Amateur Extra Class K5TS, 2016 nights camped 16