Camellia, the Seedmiser is a great addition for this creature type, as it gives evasion, namely menace, to all your Squirrels and grows them by putting a +1/+1 counter on each of them you control
Another common strategy is to gas up your opponents creatures with cards like Sheltering Ancient and Evolutionary Escalation, then turn around and use Mob Rule or Insurrection to close out the game
This can provide a significant cost reduction to many key Dragons, making it quite powerful when paired with a wide variety of Dragon-Tribal synergies
I highly recommend going Red/Blue (Izzet) because that gives you access to the best coin flip cards and to some of the best artifact tutors to consistently find Krark's Thumb each game
Sidequest: Catch a Fish / Cooking Campsite Sidequest: Catch a Fish has a fantastic design, first and foremost
You can target one of yours and add mana