2001 3023 registers OL on my P2 brake controller

First of all, thank you for all the help so far. we really do appreciate it.

We have set the date for our first trip, and it is approaching fast.
I towed the trailer for about 70 miles last weekend just to get some practice, and noticed that the brake controller would display OL from time to time, especially when coming to a stop.

Not wanting to take any risks, I'd like to address it. Googling it, i read that this is a problem with the e-brakes on the trailer.

with the trip aproaching quickly, I'd like to deal with this asap. So I'm thinking I just replace the brakes/drums+bearings this friday.

Is there a parts list for me to order:
1. wheel bearings
2. grease
3. ebrakes (replacement)
4. drums
5. anything else I need?


I've already replaced the tries with new ones, and have steel stems installed. the tires are holding pressure well (10 days now, no leakage).

Thank you,

-Z