Mgr1001 wrote:
... If I can, and decide to do this, can I do one axle at a time? Is this advised? ...
Are you asking if you can jack up one axle at a time, so you don't have the whole trailer up on jack stands, the answer is yes absolutely.
Are you asking if you can do one axle this month, and the other axle next month, the answer is yes absolutely. But you already know those tires are going to fail, so why would you want to risk it? As far as handling, I've done this, and you won't notice anything.
On the other hand, if you'll be sitting at a site for the duration anyway, no problem doing the swap at different times.