i pieced together a 29+ wheelset for my 2015 Mukluk 3 and have been happy with it for bikepacking. The rims were from Chain Reaction - Easton Arc 35 - and set up tubeless with 29 x 2.6 Nobby Nics - IMO a good choice for a bit less weight and a bit more fast-rolling than a 3" tire. Front hub is a Hope Fatsno (135mm spacing) and Salsa Mukluk 3 rear hub (170mm). My local shop laced em up.
Looking good and an idea to go a bit narrower.