Sounds like you'll be having lots of fun soon! I need to exercise outdoors more often.
I've done tabata sledgehammer swings before (20 seconds all out/10 seconds rest x 8 rounds) and it's a blast. I usually do one full set of 8, rest for a few minutes then do a second set. I'm always nice and winded after those. It's not a superset, but it's a great workout. Any of the options you mentioned sound like they would work well for a super set.