Well, they had to truck the structures for Miramanee's village out to the location as well. It wasn't a very large village
, just five fairly basic structures and a number of canoes, but the total amount of material involved seems at least as great as the amount of wood that would've gone into building the obelisk.
And if you think about it, the weight and volume of all those pieces of scenery probably wasn't as substantial as the weight and volume of the cameras, sound equipment, lights, generators, trailers for the cast and crew, craft services (food) table, etc. that they would've had to truck out to the location anyway. It's not like they normally would've just driven up there in a pickup. Location shooting is a major operation. Transporting and erecting the obelisk would've been a relatively small part of the total logistics.