Adams Peak is simple and stunning. Stay in a local hotel, climb the peak in the early hours and watch the sunrise over the mountains, it is peaceful and beautiful.
A few things to note:
You need not stay in the area more than one night, there is little else to do.
Also, bring warm clothing in a bag to put on at the top of the mountain, although it is hot walking up and down the mountain, once you stop walking it does get very cold whilst you await the sunrise.
You most definitely do not need a guide for this trip the route is very obvious.
It's takes around 2.5 hours at a normal walking pace and the sun rises between 5:45-6:15 so get up and go, there are plenty of little stalls selling snacks, hot meals, tea, coffee and water for the duration of the walk.
If you can fit this into your trip as a couple or a group of friends it is a lovely experience and shouldn't be missed.