totally depends on the time that you would PG and the modality, if you can do full x4 th, lets say doing 5kk/hr, is 15kk a day, 45kk a full weekend of x2(300%) doing 3h daily,
now, if you try to hunt many hours after spending your stamina bonus, then you would lose 1.6kk/hr due not having stamina bonus that mean 4.8kk a day, if you was able to hunt with stamina the first day then you will lose only 2 days, that mean 9.6kk in total (assuming you would hunt at 200% the 2nd and 3rd day, that exp lost would be considerably less if you get some hours restored but i wont take those into account)
if we assume that you would maintain the same exp/hr without stamina (3.3kk at 200%) then you would need only 3 extra hours of hunt to compensate the loss exp (12h total), whatever exp come after this point is bonus.with 100% of certainty.
All that said, if you aren't going to hunt at least 12h at decent exp that weekend (3 hour at 300% + 9h at 200%), probably would be a lot better to hunt 9h at max exp possible (300%), talking on time and exp wiser terms.
Said in other words: for each 2 hours of stamina lost you would need to hunt at least 1 extra hour at same exp Only to compensate the exp loss.