As much as it is on theme, I don´t think Hidden Stag helps you here. You actually have a handful of ways of searching for lands which might sound like it helps because you can hide it but poping one of your creatures to save a 3/2 that could be there. Might I suggest Cream of the Crop? It´s an interesting little deck fixer which gets crazy good with Door of Destinies and gets you some value from Glimmerpoint Stag, plus if the top of your deck isn´t working for you you can shuffle your deck with your land searchers. Think it´s not too far on theme for it to work
4 Golden Hind
4 Dawntreader Elk
2 Burnished Hart
3 Glimmerpoint Stag
3 Heliod's Emissary
2 Stampeding Elk Herd
2 Great Sable Stag
2 Door of Destinies
2 Behemoth Sledge
Enchantments(6)
2 Hidden Stag
4 Rancor
Instants(6)
4 Path to Exile
2 Selesnya Charm
4 Canopy Vista
4 Blossoming Sands
9 Forest
7 Plains
Also, Elkin Bottle is actual card advantage in an Elk deck. Who knew?
But on to my comment. I would up your Door of Destinies to 4 rather than 2 for more consistency of getting them.
I run 4 in my unicorn deck and they really become roid freaks very quickly.