So. I never watched the show in order until recently. Im on the late season 2 episode with the wormhole and I think I was scratching my head before with some other episodes as I thought it was two way. That episode finally made it clear it was one way. Also will add a mildly infuriating but do a community search for stargate does not bring up this community.
I can’t remember if some of the UAVs are wire guides or all RF but they work fine until someone stomps on them