There's a total of seven weekly quests you can WoTLK Gold undertake and Wintergrasp which will give you around 3700 honor per quest that's almost 26.000 honors for completing these quests. Some of them have to be completed within the actual combat to win Wintergrasp.

You will also receive 10 Stone shards cheaper for each quest completed which are available at the Wintergrasp quartermaster's office to purchase items.

Your faction needs to be under the control of Wintergrasp in order to gain access to this quartermaster. I am not sure what a season five Phase One winter dress quartermaster will sell so I'm unable to give any details on which items are available cheap WoTLK Classic Gold starting on the first day.