Tips for visiting Ustyurt National Preserve cheaply from Aktau?

I might be visiting Aktau alone this year and I would really like to go to the Ustyurt natural preserve. But all results online seem very expensive and often include food and camping material while I'd be fine with my own food and tent. It seems that the park in pretty much inaccessible without an experienced driver and an offroad vehicle. Does anyone have experience visiting the preserve? I'd like to know whether or not cheaper options to visit are available and reliable :) Would it be realistic to go and find locals or tourists in Aktau to group together and organise our own trip?