I have been on the caravan twice. You get to ride around in the back of an open bed truck into the giant (many,many,many acres) enclosures and get close to all the animals...within 20 feet usually, but sometimes closer. We went on the bigger tour which took us into both large enviornments and got the chance to feed apples to rhinos. I was so close to a rhino as I shoveled apples into his mouth that I got to touch him. I mean, seriously---I touched a rhino!!! Far too cool for me. We also fed giraffes which was great, just not the thrill of being THAT close to a rhino!!!!
The tour guides are very knowledgable and tells all sorts of stories about the various animals.
So, I would give it a HUGE thumbs up!!!! But, keep in mind, Escondido is pretty far inland, so it gets beastly hot...early,and you are in the unshaded open bed of the truck. So, if you can't get the first tour of the day, I would give it a skip. Of course, if you thrive in the heat...go ahead!!!!!
Also, if kids are younger than 12...don't think they are allowed. And, the truck ride is pretty bumpy...my dad who is somewhat handicapped had a lot of trouble maintaining his seat.
Good luck. Say hello to the rhinos!!!!