It seems like a lot of people are saying that Classic Dungeons are not as hard as we are thinking they are... That basically when Tanking as a Warrior you only need to "sit in defensive stance and basically spam sunder, revenge and blooodthirst with a 2H weapon, or switch to 1H/Shield if you feel like you're taking too much damage." ... "Also, you actually don't need to spec prot for tanking dungeons in classic. You can tank fine as arms or fury and do a lot more DPS/TPS. You don't even need defense. In fact, being crit helps since it triggers enrage. All you need is gear with a decent amount of armor/stamina. Just make a macro to swap to 1H/shield+defensive stance when necessary. 2H Fury is pretty solid DPS at low levels before you get enough hit rating to DW." Anyway, those were the notes I copied into my spreadsheet and if I copied it correctly the following was the recommended spec for Warriors to use while leveling (if my memory is correct the quotes/spec came from Apathiest though many others said Tanking was easier than we are thinking with some saying that even Shaman Tanks would be fine):
https://classicdb.ch/?talent#LZVVzA0xoVoxfzox
If buffs don't clear when going into BGs you could have them buffing your main (and any premade teammates) before in. If that tests out I had planned on leveling 1 of each in a 2nd party (not my main party) to park at a BG entrance to summon and buff my(our) main(s) before going in. Don't forget also handing out SoulStones and HealthStones...
You would be the candy-man :-)