Getting to Vela Luka Korcula from Split or Dubrovnik by Camper Van

I'm visiting Croatia in June this year and have family at Vela Luka on Korcula island and would love to visit them but I'm limited for time. I would like to go for the day but if that isn't possible I could go for 1 night but would have to take my campervan. And I'm guessing this will be expensive! I can leave from either Dubrovnik or Split, whichever is easier and less expensive. I'll be in Dubrovnik on Wednesday, Thursday and Friday night (21/6 to 24/6) and I could stay the night on Saturday night. Could you please give me some options and costs. I have looked at the timetables but find them very confusing. The campervan size is 599cm in length and 205cm in width.

Split to Vela Luka timing and ferry prices (bottom of the page) is here:
https://www.croatiaferries.com/split-velaluka-ferry.htm
Prices for campervan are there too.

The cheaper option is from Dubrovnik =>> drive to Orebic (90 min approx) and get your campervan on ferry (15 min aprox):
https://www.croatiaferries.com/orebic-domince-ferry.htm
From there drive to Vela Luka (40 min aprox)