One thing not mentioned was cost and Price.
How far away is it? You will be driving over several times during the course of the trap out to check the status, and replace the nuc or box you are collecting bees in if necessary.
Setting up ladders each time etc, etc.. It can be quite a bit of work and expense.. If all you want are the bees, a Nuc would be cheaper. If it is a paying job, make sure it is worth what you are about to go through.
Package = $90.00 ?
Nuc = $150.00 ?
I can often find production hives in good shape for around $300.00
Will your cost exceed any of these?
So.. Walk away if it will be a lot of work and expense for "free" bees Or walk away if the price is not worth the struggle you are considering undertaking. I too will go a bit out of my way for survivors, but there is no guarantee they will rebuild in time for winter, or survive the winter. Do they have disease or mites? Treating is also expensive..
Free bees are great if they don't cost too much.