Getting There -- Irish Rail (tel. 01/836-6222; www.irishrail.ie) provides daily train service between Dublin and Bray and Wicklow.
Bus Éireann (tel. 01/836-6111) operates daily express bus service to Arklow, Bray, and Wicklow towns. Both Bus Éireann and Aran Tours (tel. 01/280-1899; www.wildcoachtours.com) offer an excellent tour that they have dubbed the "Wild Wicklow Tour." It certainly is lively and enjoyable, and includes visits to Avoca and Sally Gap. Another tour option is the Mary Gibbons Tours (tel. 01/283-9973), which does an absorbing, in-depth tour of Glendalough.
Still, arguably the best way to see Wicklow is by car, as that's the only way that you can take in all the little villages not well served by bus or train. The Dublin Tourist Office has excellent road maps for all of Ireland. Take the N11 south from Dublin City and follow turnoff signs for major attractions.
Visitor Information -- The Wicklow Tourist Office, Fitzwilliam Square, Wicklow Town, County Wicklow (tel. 0404/69117; www.visitwicklow.ie), is open Monday to Friday year-round, Saturday during peak season. The Carlow Tourist Office, Forester's Hall, College St., Carlow Town, County Carlow (tel. 059/913-1554; www.countycarlow.com), is open Monday to Friday year-round, 10am to 1pm and 2 to 6pm.