We're interested in an ice cave tour. We're driving around the island with the south coast last on our list. Suggestions?
There is an ice cave tour provided at the Jokursarlon glacier by some group. Try that. If nothing works & you return back to Reykjavik, then go the Perian center for an artificial (but with real ice) ice cave walk.
Found an amazing ice cave tour. https://katlatrack.is/ice-cave/ Highly recommend. Great tour guide "Kevin." Not a difficult activity if you're reasonably fit. $498 for 2 people.