Tips for jungling on Twisted Treeline (TT - 3v3 map)?
Solution 1:
Jungling 3v3 is possible and is seen in higher ELO games. There are lots of videos showing it on own3Dtv. I recommend browsing Twisted Treeline videos to see how it's done.
Good junglers for 5v5 also are good junglers for 3v3, but keep the differences between 3s and 5s in mind. In addition to aggressive dps champs being favored in 3v3, there is more competition for the small number of camps in the jungle. Aggressive junglers do well because they have plenty of opportunities to harass the enemy; Nunu and Cho Gath come to mind, both being strong junglers with good ganking potential and great harassment. If you watch some Twisted Treeline games you will see non-aggressive junglers like Warwick being dominated.
Solution 2:
It's certainly possible.
There's no real difference in hero viability between 3v3 jungling and 5v5 jungling, other than the lack of the Ancient Golem buff, which may hinder some junglers who rely on the mana regen it provides to continue jungling (Udyr comes to mind).