Related to this question, does the Morryde CRE3000 have the equivalent of bronze bushings already installed? I bought the Morryde wet bolt kit to install on my Jayco TT. I broke a spring on my last trip and decided to replace all 4 as preventive maintenance. I did wet bolts and bronze bushings cause it was only $85 more.
My springs had nylon bushings, which I swapped out. Looking at my CRE3000, it appears they have metal bushings already. There was no way to push in my bronze replacement bushings and the hole diameter was exactly the size of the bolt anyways.
Now, to answer your question OP.
I jacked up one side of the trailer at a time and used jack stands to hold up the frame. Take your tires off and support the axles with a jack (not a jack stand, you'll need to lower the axles to press in the new bronze bushing and then lift it back to the shackles). It took me about 2 hours per side (to include jacking the trailer) to take everything off and install the wet bolt kit. I also replaced the springs (I had one fail on a trip to Vermont last week) in that time. Its fairly easy to do if you have the right tools. Having an impact wrench helps.
I did one side by myself 2 days ago and did the other side today by myself. 4 days is crazy!