Lot's of people have installed "wet bolts" (greaseable suspension bolts) and it is a good idea to do so. Many have done the job themselves; a little mechanical experience and a few tools will get the job done. One person can do it, but having a helper is easier. Any RV dealer should be able to do it for you, if you want someone else to do it; it's a common job.
Here's a link to a good thread in this forum: Wet Bolt Install
There's lots of advice and information in forums... sometimes it is correct. For example, all of my posts are made by a political appointee who got the job as a reward for contributions to my diesel bill.
2011 Jayco 28.5RLS; 2008 Chevy Duramax; Pullrite Superglide Hitch