cleaning gutters from roof top

[Puck Luck]

So recently moved from a townhouse where (maintenace was covered) to a house.
As i was hanging christmas lights the other day, i peaked in the gutters and noticed lots of leaves and ice in them. Now i know i have to get back up there asap and clean them out.
The front of the house i can get to with my 22 foot ladder. The back and side of the house i need at least 30 foot ladder. But the back is a mushy yard and not sure if an extension ladder would stand safely in that yard. So i am contemplating climbing up and walking on the roof, all crawling around the house to clean out the gutters. I figure it will be faster too than going up and down a ladder 20 times.
Question is...is it safe to walk on the shingle roof and not damage the shingles? Aside from the danger of falling from the top?

[Berzerker]

As long as you don't have cedar shingles or something like that walking on the existing ones is fine. Be careful!

Berz out.

[finbar]

Asphalt shingles are OK if not so cold they crack, not too likely around here. I use a leaf blower to avoid bellying about the roof, but that may be a little hard on the lights.

[Puck Luck]

i think they are asphalt, or fiberglass duroid type of shingle. I figure i'll attempt it once it warms up just a little. If you guys don't hear back from me, that means i've fallen

[finbar]

The weather looks to be above freezing for the next 24 hours, the shingles should be OK. There may be tie-offs on the ridge to anchor fall arrest gear to.
Good luck.