Group Backpacking Logistics: What Gets Complicated and Why
Planning for four or more people is a different problem than planning for one

Planning a backcountry trip for a group of six is not the same as planning a solo trip and multiplying by six. The permit system, the gear distribution, the pace management, and the emergency planning all change in ways that aren't obvious until you're standing at the trailhead trying to sort out who has the water filter and who has the stove fuel.
Permits for groups: the quota math
Most wilderness permit systems set a maximum group size, typically between eight and twelve people, and issue permits per group rather than per person. This means a group of ten may need only one permit, but that permit may be harder to get than a solo permit because the quota impact is larger.
Some areas split their daily quota between lottery permits and walk-up permits, and the walk-up quota may have a lower group size cap than the lottery. Knowing the specific rules for your target area before you apply saves a lot of confusion.
Shared gear and the distribution problem
In a group of six, you don't need six stoves. You might need two. But you do need to decide who carries what before the trailhead, not at it. A shared gear distribution plan, written out and confirmed with every member of the group, is one of the most basic logistics documents a group trip needs.
The distribution also needs to account for fitness and pack weight. A member who is carrying a heavier base weight because of their sleeping system shouldn't also be carrying the group shelter. The math needs to work across the whole group, not just for the strongest hiker.
Mixed experience levels and tiered routes
The most common challenge in group trip planning is a spread of experience and fitness levels. The solution is not to plan the trip for the weakest member and frustrate the stronger ones, or to plan for the strongest and leave the others struggling. The solution is to build tiered route options within the same general area.
This means identifying a primary route for the stronger members and a parallel or shorter route for the others, with a shared camp at the end of the day. It requires more planning, but it means everyone has a good trip.
Group trips are worth the extra planning work. The logistics are more complex, but the experience of moving through wild terrain with people you know is different from solo travel in ways that are hard to replicate.