We had a Conway Olympia and our first attempt at erecting it was in a very wet camp site in the lakes. With a useless wife and kids laughing and not offering much help.
Firstly –
Some trailer tents don’t need the awning on to be watertight, so you may be ok with that.
The main tent section –
With ours, the canvas for the tent itself is connected to two folding sections. Simply unfold these and climb inside so you’re sat ontop of the bed sections, the poles that support these sections are telescopic with the little ball bearing type locks on them, slide them up until they lock into place and then attach the two sections to the main supports to create the pitched roof.
The bed sections can then be folded out into the canvas areas, they have folding legs that will drop down. They’ll just need to be adjusted to suit the terrain.
Pretty simple and can be done by 1 person.
The awning, however, is another story (ours had missing poles when we tried putting it up, so a bit of fettling was required)
Hopefully your neighbour has gone through the pain of this before and has colour coded the poles. get the framework up first and then pull the awning over the top. At a stretch it can be done by one person, but it is easier if you have a competent helper! Just make sure you have a step so you can reach the zip at the top of the awning as they’re about 8-9ft tall.
They are great once they’re up and have masses of space and with practice they can be pitched with awning quicker than a caravan and side-awning.
good luck!