Wrought iron Fence

Hi gang. Another question from the hack-welder.
I've got it in my head to put in my own wrought iron fence..... OK, more
like a "hot rolled" fence, but you get the idea. What I've got in my head
is to use 5/8" square bar steel with spear finials on top. I need it pretty
tall to keep my hunting dog in the yard, so I'm thinking 6 feet tall with 5
inches between uprights and weld them in 6 foot wide panels. Connected
primarily by 2 horizontal 5/8" square steel bars welded to the front (or
should I be looking for pre-fab punched channel to slide the bars through?).
What I haven't decided on is how to connect the panels. I see a lot of the
commercial fences use square tubing pre-punched to slide in the "arms" of
the square steel. I could buy square tubing and either simply butt-weld the
horizontals to the square pickets, or drill a hole and then fill in the gaps
by welding after I've mounted the panels.... I'd appreciate any ideas. I
suspect many of you may have practical experience with the project-- and may
have some pitfalls for me to avoid.
If you've got the time, I'd appreciate your ideas. Thanks.
Joe the hack-welder