Pulau Weh is certainly a place to relax and it is easy to forget any possible concerns. But it is important to be aware that weather conditions can impact travelling to and from the island. I had planned a seven day stay which turned into eight due to ferry cancellations.
I had organised to take one of the afternoon ferries back to Banda Aceh, but at 11 in the morning the rains came - and stayed for the next three hours. It was torrential!
The boys at Yulia bungalows soon found out that both afternoon ferries were cancelled - I was actually quite happy to stay an extra day and would not have wanted to travel in rough seas. But a few tourists were caught out - they had late night flights out of Banda Aceh and therefore missed their planes.
I'd suggest that any planning include an overnight in Banda Aceh just to be on the safe side.
The ferry terminal on Pulau Weh is more or less in the middle of nowhere. Regardless of where you intend to stay, you will need to arrange further transport from the port.
It seemed that there was almost a fixed price system - 50,000 rupiah to either Iboih or Gapang. When I arrived, a group of tourists were haggling for a better a price, claiming that as they were a group of 6, they should get a discount rate. The locals claimed it didn't work that way - basically 50,000 for a 'ride' regardless of how many were in the mini bus/car.
I met a German tourist and we each paid a driver 50,000 to take us to Iboih. The great thing was that he was quite happy to stop at look out spots along the way so we could take some photos.
The roads around the island are very good. The trip to Iboih is close to half an hour.
It is probably important to check with a few people about ferry times to Pulau Weh from Ulee Lheue ferry terminal. In January 2012 both the fast and slow boats were departing twice a day, once in the morning and once in the afternoon.
Both boats leave Pulau Weh at around 7 am. The fast boat arrives at Ulee Lheue at around 8.15. It then unloads, reloads, and takes on passengers before leaving again between 9.30 and 10, just as the slow boat is entering the harbour.
Fares on the fast boat were 55,000 for economy - which in fact seemed more comfortable than the other classes as there was a cool breeze and you can stand outside and hopefully catch a glimpse of dolphins frolicking beside the boat.
You also need to remember that the Ulee Lheue terminal is between 20 and 30 minutes from central Banda Aceh - longer if you are ggoing by public transport.
It is always suggested to arrive at the port an hour early to ensure you get a ticket - especially for the fast boat during busy times such as weekends and Indonesian holiday periods.