This is the bike trailer that allows us to have some flexibility when we are camping. If we are going too far for the dogs to walk they can just pop in the bike trailer. Here they are after our hike last weekend. Funny though - even though "I" was the one who biked 14k hauling 35 pounds of dog THEY were flaked out when we got back to the campsite. I bought it second hand but it had barely been used. I had originally been looking for a child trailer but this is a pet trailer. The dogs enter from the back. Did I mention it's awesome? The dogs seem okay with it so far. They are used to travelling in a crate so it's not that much different for them -except Max tends to let me know (by scratching) when the ride isn't smooth enough for his liking.