I haven't done the invite strangers much, but they weren't total strangers when we both had been posting on a fishing forum. Worked out OK, but not everyone wants to fish the way I do. I was invited to float and fish with a total stranger on the Wenatchee River some years ago. Kinda' surprised me, but he said he had seen me fishing the run near where we met. His fishing partner had to return home while he still had a couple days left to fish. I said, "Sure," assuming he knew how to row his raft and so forth.
He was surprised that I was set up with only a floating line, while he was geared up the way I would for winter fishing. I said, "It's your boat, so your rules, but the way I fish floating lines go ahead of sinking lines." He was OK with that. I had years of experience on that river, and he had a few days. So I felt that I had something to offer. Seemed like we hit if off pretty well, but we never contacted one another after that trip. I recall that he had some serious work and family business waiting when he returned home. I hope it all worked out.