In reply to BOOGA:
the bus service to the ski car park goes from the town centre (there's a timetable online somewhere), and if you miss it there are always climbers willing to give you a lift, especially if you're there on a weekend.
the climbing wall at the north of aviemore has rooms - its the cheapest accomm in aviemore i think, but a bit of a trek (25 mins?) from the town centre and the bus stop. the YH is better positioned, but more expensive, especially if you're not a member.