A nice video about the Swiss F3F Championship that was organised last week-end in a nice place (Hahnenmoos/Schalmigrat)
Not too much wind apparently :( ...
Flying also in the Alps, I would say that October is a little bit late in the season. The thermal breeze is not blowing strong in Fall. That's why we are organizing our club competition beginning of September, not later.
what is good if doing F3F in slope like Hahnenmoos or the Col du Glandon is that the breeze is consistent and the thermal effect is very small. As a result Col du Glandon is currently the fairer place to fly F3F in France. The disavantage is that the probability to meet F3F condition is lower compared to region like Toulouse, or south east.
In Brief, there are pros and cons ;) !