The first wagon is Monster Graveyard.
You'll fight against Nighthunter, Stalking Stalk, Sulphider, Sulphur Spouter and Undertaker. You need Earth, Death and Fire Damage as Physical Damage and has a monster that roots in area.
The second wagon is Crystal Enigma.
You'll fight against Noxus Ripptor, Headpacker, Shrieking Cry-Stal (fears), Mercurial Menance and Mantosaurus. You need Physical, Energy and Poison Protection.
The third wagon is Sparkling Pools
You'll fight against Hulking Prehemot, Gorerilla, Gore Horn (it rarely roots, but does), Sabretooth and Emerald Tortoise. You need Physical, Energy and Fire Protection.
If your party is less than level 1000 I would recommend x5 with two druids, hazard 8 or 9. The level depends of the hunt, the hazard level and the party level and it's items and protections, so it's really hard to measure. you gotta test the hunt and see what happens. I'd recommend starting at 6 (if you're too low level) and level it up with your experience.