I don't like the bar-end mirrors, as I have to stack 3 bikes next to each other and I'd need the bike to be about 6ft wide to see behind me, so I've gone for a frame-mounted mirror which looks under the saddle.
I'm not sure what luggage you are looking at for your LHT but I've got a
Bike-Eye on my Secteur and Tricross and it works fine on them with either a tail pack or a seat post mounted rack. I have used it with a
Large Topeak Wedge Pack on both bikes and a Topeak MTX rack with
Trunk Bag. If you look at
this image from the Bike-Eye site, you can see that there's a fair bit of room between the saddle and the mirror's sight-line, but it's possible that luggage would block the view.