I've tanned a few deer and antelope hides using egg yolks and olive oil to replace the brain in the tanning process
For smoking I use an old pot belly stove with no pipe and simply place hide in an overturned lock tub or half barrel, using punky
wood or leaves to create my smoke
It's a rewarding process, and most of it is somewhat flexible for those who are busy, but the soaking stage shouldn't go too long or you'll rot the hide, and working the hide as it dries can be labor intensive
To shortcut working the hide while it dries I like to toss the hide in a
dryer with some horse chestnuts for softening and take it out every 5 min to stretch it out so it doesn't Crack
Haven't had the chance to do much tanning since I started my new job :( but the main challenge for me is getting someone else to turn the finished leather into something useful, most of the time it sits around rolled up in a tote, though I did fix a hole in my hammock with some antelope leather so yay for that:)