Lookin at the pics of your ground you probably wont need anything extra under the base , one extra thing ya don't hafta screw around with
I've wrapped a chain around post/rebar then placed a pair of vise grips above the chain to keep it from slipping while nacking up with handy man jack (what then Hi-lifts are called around here). Might be less to carry than the pipe wrench.
That'd make one heck of a bottle opener. I hope this is going well LongShot . You might need that bottle opener since it looks pretty dry out there.
It has been years since we've done this but we used to wrap a chain around a post. Use something like a 2 x 4 or 2 x 6. Stand that at an angle. Put the chain over the 2 by and then fasten it onto the drawbar of a tractor (or truck or car) the gently pull it out. Worked like a charm.
Wish I had a small tractor, but I don't. I don't think I could justify the expense to Mama anyway - she will always be a city girl no matter how long we live in the country. It's a good thing I love her.