Not to "put the spoke in your wheel", but a shooting partner needs to be chosen well..especially on long-ish and trying trips.
A lot of factors come into play - general frequency, interests in particular genres, patience levels,etc. Nothing spoils your "shooting spirit" like conflicting interests / pace. Some people like chirpy folks around them, some prefer the more quiet kinds.
I'd say take a shorter trip if it is someone new and take it from there