The walk from Grindell's hut to Weetootla campground traverses Weetootla gorge. It is a walk of moderate difficulty and is well described in the national park handouts and in their app. It's a delight to walk through cool green gorges with springs and pools when the vegetation on the hills is scorched and only just clinging to life. You can detour to visit the Monarch mine if you wish.
Iga Warta lies just to the west of the park on Leigh Creek Road local indigenous people run it and offer accommodation but the real drawcards are the tours of the local area which they arrange. The Malki painting site is one of a few painting sites in the Flinders Ranges. Red Gorge is one of the Flinders Ranges' most important engraving sites and Iga Warta is the only organisation arranging tours there. The social history tour visits Minerawuta (Ram Paddock Gate) - of great significance as it was the last traditional Indigenous encampment in the northern Flinders.
You could easily spend 4 or 5 days there if you wished to go on all the tours but even one tour gives you some insight into the local indigenous community.