Our Skaftafell trips depart from our sales office which is located on the parking lot of the Skaftafell Visitor center in Vatnajökull National Park. From there we provide transportation to the glacier, this is included in the trip price. In regards to our Glacier Wonders, Glacier Explorer and Glacier Extreme Trips our driving time is only about 10 minutes to the glacier from Skaftafell (traveling East towards Höfn) so there is very little time saved on those trips taking your own car.
As far as the Glacier Grand Slam trip goes we depart from Skaftafell, arrive 10 minutes later at the glacier parking lot. After our glacier hike is done we travel back to Skaftafell by 14:00. You will then have to take your own car and drive East (towards Höfn) to the Fjallsárlón Glacier Lagoon where you join the Zodiac boat tour. This drive is roughly 30-35 minutes and you could save 10 minutes of this time if you take your own car.