When I was a Boy Scout Leader, we did a lot of hikes and camps with the boys.
Our policy was:
Anybody could join our day-hikes. We start to know each other that way, and learn how to get along together.
So those day-hikes were a requirement to join our week-end camps, during the year. Here we learn about each other's interests, commitment level, and attitude.
Finally, attendance at any week-end camps was required to join our week-long summer camps.
Our policy worked well. Despite a wide range of interest and ability, everybody (boys, parents, and leaders) was ready for the commitment and performance, when they needed to. We shared exploration and adventure, learning and fun.
Now I'm a climber, building skills, accumulating gear, and growing teamwork.
Climbers can use a similar policy:
Anybody can join us for sport climbing at the crags.
So your sport-leads, and sharing ropes and gear, and helping newbies, establishes group dynamics and trust.
Finally, some folks will coordinate to do bigger trips, like alpine, multi-pitch, and multi-day adventures -- when they are ready.
So you'll never need to hook-up with "bad" partners, because you'll be busy sharing your adventures with folks you know and trust.