"(From what I have read so far, it looks like RVs and Lis don't mix very well in most RVing scenarios)"
This opinion is considered invalid by some here who have been using Li batts in their RVs with success in their particular scenarios.
They have not shown that their particular scenarios are like "most RV scenarios", so it is up to them to show how their experiences are in fact typical, and thus why most RV scenarios would work well with Li batts.
The confusion the OP has asked about is over
1.floating vs not floating, and we can add
2. whether to fill to 100% SOC or not.
BB has a list of chargers they consider suitable and some IMO confusing answers to questions on that topic in their website. If it were not confusing, people should be able to just read that and ask no more about it.
It would be of help to hear from those here who have been using Li drop-ins in their RVs what they do wrt those things. Not much has been heard in detail how they actually operate their drop-ins.