I created 3 bookmarklets to load relations from WT and to load a relation from osm.org in WT

See osm.wiki/Waymarked_trails

I created these when I got tired of copy pasting the numbers over and over. I hope they will be of use to you.

Happy mapping of relations!

PS: I just updated this bookmarklet to support jumping from Google Maps: osm.wiki/Bookmarklet_JumpToOsm