Tips, tricks & notes:

• Carrying an anti-poison with you at all times when you're in Isafdar forest is advisable.
• You cannot use any prayers, weapons or armour in Glarial's Tomb, so may sure to take more food than you normally would need.
• The tomb will not allow you to bring in crafting or fletching supplies.
• The zombies in the tomb drop weak weapons such as maces. It's possible to get a drop and then use it on the Moss Giant, but it may not really help.
• It's convenient to start the Mourning's Ends - Part 1 quest right away (by talking to Eluned) when you have finished this one.