I just took down 10 strands, 900 ft perimeter late summer around my mini-orchard/garden area that was mounted with electric fence insulators on wooden and t-posts. I built a wooden frame that I could stake to the ground with tent stakes and used some 3/4" cpvc as spindles to wind it up into spools. I kept a couple of spools and trashed the rest.
I used a piece of plywood for the base, 2x4s for 2 uprights with holes drilled up high for the cpvc spindle to slip thru. I drilled holes in the cpvc spindle to put a 1/4" bolt thru on the outside of the uprights to keep the spindle in place while cranking, I used flat washers to keep the bolt heads from digging into the 2x4s AND on the inside of the uprights to keep the wire from getting into the wood while winding. Out towards one end of the spindle I drilled a hole to put a short piece of 3/8" rebar to use as a handle to crank the spindle. When the spindle was full, I removed the bolts from the spindle and removed one of the uprights to get the loaded spindle out. Each spool holds probably 1/3 to 1/2 mile of wire in my case.