Some might think it's a waste of money... but I have decided that for me, it isn't a waste. As long as I do them tastefully and try not to include what could be considered "junk". I am putting a lot of thought into each item. I think they will appreciate it. Same as everyone else - it's more than anything, a gesture to show your appreciation.
I travelled from Edmonton to Calgary last summer to attend my fiance's cousin's wedding. When we checked into our hotel room, there was a gift bag waiting for us with a bottle of wine, 2 wine glasses, some munchies and a map to the church. We thought it was such a nice gesture and just so thoughtful, and it was pretty much my inspiration to do these OOT bags!
When I think of items to put in the bags, I try to only include items that I would use/want myself... because if I would want them, chances are most would probably be able to put them to use as well.
Also, the OOT bags are basically our wedding favours. (We are including custom drinking tumblers in them).