If the 2 year old turns out to be a female I'll put them together when she's closer to his size. The area Bugsy's in now is about 40'X40' with another 40'X6 feet on the side of my house. He uses every bit of it. My dogs have the other half of the yard. The pen for the smaller ones is built in the corner of his yard. I haven't measure it, but its around 6x6. I have the sulcata in with the desert tortoises for now, but I'm going to have to make him his own pen soon.
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Joe
Lampropeltis
Elaphe
Spalerosophis
Crotalus
Geochelone