Being that I always have too much time on my hands with nothing to do

I decided a few years back to roll my own for trips north. It is amazingly comforting to hear it crack when a wet nose touches it while you're trying to get a few winks in.
I use this energizer, mostly because it uses D cells, which is common with the portable beacon I carry, and it is of good brand;

Get it on amazon or Valley vet supply online
I use these poles from any farm supply, but cut them in half for stowage, then while at the farm supply buy a stick of 7/16 thin wall tube, cut it into 6" lengths and epoxy one to all the lower halves (think fishing pole);

I use turbo wire, cheap and handy. Cut 4 lengths, 105' if you want a 25' square, or whatever... it can be had at amazon, tractor supply etc etc... ;

Tip; order a bag of tent stake tensioners and fix them to one end of each wire so that it is a continuous loop. It will make setting the thing up and tensioning a thing of extreme ease, again amazon, rei if you swing that way, etc;

These little clips have a circle in them the same dia. as the poles making them speedy to snap on and thread wire through. Amazingly speedy;

I always flag the runs. I figure, I'd rather have a curious nose slowly touch the wire, than one that is attached to a running body that didn't see the wire;

Some random thoughts,
While at TSC, get a cheap tester. The fence is only good if it is hot.
Don't worry about switches if you buy the energizer I suggested, it is switched, and just hangs on the wire.
If you are in sand or rock, you will not be able to ground a very big area with a single ground rod (I use a 2' x 3/8" steel rod). In these areas, I run 4 wires instead of the usual 3 I would normally do, and alternate them from ground to hot.
Next time you're at the rainbow remind me and we can set it up. Takes about 7 minutes
Take care, Rob