camper axle lube question ?

rig maintenance question:

I know its off topic for this section, but most of you guys are in charge of lube and maintenance of your rigs.

new jayco 27 foot bumper pull trailer last year, pulled it about 1000 miles or less.

this year I was going to pull the rubber grease zerk covers off each hub and shoot a few pumps of axle grease in each hub.
per manual: grease flows from end of axle through and up into the cavity of the hub.

would 4 or 5 shots of grease from a manual grease gun be sufficient?

Thanks,
Fred

I plan to carry my grease gun with me and check the hubs at each stop.
but, I know if over lubed grease could get onto the brakes.