First tests failed to add the elders, these fixes SHOULD do the trick.

QuestHelper/custom.lua

@@ -261,8 +261,8 @@ end
 
 local elders = {
   ["Alliance"] = {
-    ["Bladeswift"] = "DARNASSUS 39 32",
-    ["Bronzebeard"] = "IRONFORGE 29 16",
+    ["Bladeswift"] = "Darnassus 39 32",
+    ["Bronzebeard"] = "Ironforge 29 16",
     ["Hammershout"] = "Elwynn Forest 34 50"
   },
   ["Horde"] = {
@@ -394,20 +394,20 @@ local function searchElders(input, yield_countdown, yield_countdown_max)
   local achievement_match, elder_match = false, false
   for achievement, eldrs in pairs(elders) do
     if input and input ~= "" then
-      if input == achievement then achievement_match = true end
+      if input == string.upper(achievement) then achievement_match = true end
     end
 
     for elder, elder_loc in pairs(eldrs) do
       if input and input ~= "" then
         if achievement_match then -- just add it
-          yc = searchLoc(elder_loc, yc, yield_countdown_max)
-        elseif input == elder then -- We have input and it's not an achievement, so it must be an elder.
+          yc = searchLoc(string.upper(elder_loc), yc, yield_countdown_max)
+        elseif input == string.upper(elder) then -- We have input and it's not an achievement, so it must be an elder.
           elder_match = true
-          yc = searchLoc(elder_loc, yc, yield_countdown_max)
+          yc = searchLoc(string.upper(elder_loc), yc, yield_countdown_max)
           break -- We've found him or her.
         end -- No need for else here. We've got input so we either have an achievement or we have an elder.
       else -- We came in without an input, therefore we add all.
-        yc = searchLoc(elder_loc, yc, yield_countdown_max)
+        yc = searchLoc(string.upper(elder_loc), yc, yield_countdown_max)
       end
     end