How many of you grease your own trailer axles?

I realized the other day that I haven't greased the axles on my race trailer in 2 years, so I went and bought 5 tubes and got it done today.
I put maybe 5000 miles a year on this trailer. 3 of the 4 were a little loose (you could move the nut by hand) so I tightened them until the brake drum wouldn't spin then backed off 1 flat.
Old grease was light black but didn't look or smell burnt. Took a full tube for each wheel.
I was wondering what guidelines you use for tightening the lock nut on the spindle. Is it different than a car?
Thanks!