I have the GOTY edition and was wondering when I would be good to play those because I normally like to do dlc and the like asap so I can use the new toys on the rest of the vanilla game. Thanks in advance.

Twentieth level minimum I think, at least for the main quests. Some sidequests you can do fairly early. But as a rule, both expansions are harder than anything in the main quest.

Bloodmoon is for 20+ leveled players, I think.

Not required, just tailored for 20+.

That's going to depend a lot on your character. Some characters are tougher than others. But, as a general rule, I would suggest 20 for Tribunal and 30 for Bloodmoon.

Well then this will require some leveling. Thanks guys.

Remember that Bloodmoon was made when people were complaining there were no challenges for their higher level characters. I know that, with a higher level character, best armor/high armor skill, and a shield enchanted with the highest amount of sanctuary possible, werewolves were taking my armor down to 0 in 1-2 hits. I carried a *lot* of repair hammers and prongs because I'd end up repairing most of my equipment after every fight.....