Letters of Recommendation on Aways

Quick question about letters of recommendations and securing them on aways. In general, it seems difficult (when with a new attending here or there for 1-3 days) as compared to letters from research/home institution. How important are letters of recommendation from another institution and how important is the geographic relevance of that letter (vs just putting that you did an away in location X on ERAS?).

My current situation is:
#1 LOR from Chair at home
#2 LOR from PD at home (lesser...

Letters of Recommendation on Aways