Hi, I live less than 10mins from the campsite in Rathdrum an 15 from Arklow so again, any mechanical issues or spares required let me know. You're in Wicklow for 2 nights an there's lots to see. You have Glendalough and SallyGap on your list but I can add a whole lot more to it that is all with in 20 mins travel time. Brittas Bay beach, Powerscourt waterfall, Powerscourt house, Wicklow Gaol an much more. There's another campsite in Redcross owned by the people who own the one in Rathdrum. In Redcross they have a Micro Brewery and a great restaurant.
When driving from Arklow to Rathdrum, take the road through Woodenbridge and Avoca. When passing Avoca you could stop for coffee at the original Avoca Woolen Mills. When in Glendalough there's both the Wicklow Gap an the Sally Gap. A quick spin up Military road would get you to The Glenmacnass waterfall, and just over the road is the highest village in Ireland of Roundwood, just outside it is the Guinness lake, lough Tay. You can link the waterfall with the lake with a drive over the Gap.