We have a set of DJI Mics — two transmitters and a dual receiver — with additional lapel mics connected to them. They are phenomenal for weddings, interviews, filmic dialog... as good wireless systems go, they're dirt cheap at $329 for the receiver, transmitters, charging case, and accessories. ADD lapel mics if you want them (they hide better and sound better). A bonus is that the DJI models include internal recorders in each transmitter for backup audio, in case there is interference or a dropout. It's nice to know that you have audio on both your camera and your transmitter, in case one distorts!

THE most important thing to remember about audio is that the intensity of the "desired sound source" dissipates as the inverse the square of the distance from the source. If you have full volume at one foot from the mic, you have 1% of that at ten feet! What you get then is a mix of noise and the source. To hear that, you have to crank up the input gain on the camera and/or the editing software... NOT pleasant to hear. So get your microphone CLOSE to the sound source. Within one foot is ideal. Three feet is about the maximum distance from a subject that I tolerate.

That all sounds very challenging, I know, but that's physics! Good audio is at least 60% of good video. Unless you are very close to the wedding party in a very quiet church, try to mic the bride and groom, or at least the groom and the pastor/priest/rabbi/officiant. It makes a HUGE difference!

Your description of the DJI mics would match the Rode Wireless Go II system I have. I bought it before the DJI mics were offered. There are differences for sure. The most important difference might be that the DJI mics are slightly smaller.

Perhaps useful is that Rode says you can use up to three sets. You can mic 6 people. Two feed the camera and the other four record on their own. The other way is to shoot with three cameras. It is a little extra work because you have to sync the recordings in post.