Group size suitable for the expedition
By far the most important factor in determining the number of participants per expedition is "risk assessment": the smaller the error margin on the expedition, the fewer participants per guide. On a summer expedition in Greenland, we take up to 10 participants per group, on a winter expedition typically up to 7 to 8. On some expeditions with a very high E-factor (e.g. Svalbard) we might even limit the number of participants to 5.
In our experience, such small groups guarantee the ideal group dynamic, a must for mentally and physically challenging expeditions.
The right balance
Being able to flexibly adapt to rapidly changing conditions can make the difference between a good expedition, and an unforgettable one. We have a planned trip itinerary, but along the way, opportunities might arise to squeeze in a little extra. With a small group, we can make smarter and faster decisions in balance with the specific desires of the participants.