backpacks? baby carriers?

is there a carrier that i can use for my LOs when we are out in the parks, etc. when he doesn't want to be in his stroller? we are doing Disney soon and i'm worried that i'll be carrying him!! i'm thinking wearing him might be easier?? my DH and i would each get a carrier and leave it under our stroller in case.

ETA - just saw the post below!!
i was on the ergo site; what is the difference between all the carriers? i like the backpack idea for my DH to carry a twin.

 

I love our Ergo. We have top of the line Kelty backpacks as well and the Ergo is sooooo much more comfortable and easy to stash under the stroller.

 

is there a certain ergo i should go with? i wasn't sure what the difference between all of them where.

 

Wow, there are lots of options these days. I don't think you can go wrong with any choice. I like the breathability of the performance one. The ergos are in high demand for resale so you can likely get $60-70 each if not more when you are finished with them. I still use them for my 3 year olds.

 

We have the basic Ergo and love it!

 

A basic Ergo would tuck under a stroller MUCH better than a Kelty backpack carrier, though the Kelty TC 1.1 compresses pretty well. We have a basic Ergo carrier and it holds up to 40 lbs. You can wear a baby on your back in the Ergo too, though I always found it hard to put a baby on my back in an Ergo without help. Whereas I can position a baby in a Kelty backpack carrier on a couch/bench, then sit down in front of it, put it on my shoulders, and stand up without any help. We took 2 Kelty backpack carriers to the beach, a TC 1.1 and TC 3.0. The 1.1 holds up to 30 lbs and it doesn't have a frame which is why it compresses better (but doesn't fold up as small as an Ergo would). The 3.0 has a frame and holds up to 40 lbs but it is more bulky so I wouldn't recommend it for an amusement park.