Tripod needn't weigh much. Either cough up for a carbon fibre one, or just about any small pisscheap aluminium one with a crapy builtin plastic head will do the job and weigh fuckall.
A quick tip for the gropro folks. Most people(boulderers especially, but sporties for stick clips too) these have extendable painter pole stick brushes. If instead of taping your brush to it and cut off a paint roller near the handle and you have a n easily removeable brush. This allows you to screw on tripod mount(like this: http://www.amazon.com/ProPole-Painters-Adapter-Camera-Monopod/dp/B00EVWS1JK/ref=sr_1_1?ie=UTF8&qid=1449512542&sr=8-1&keywords=painters+pole+camera+mount. This turns your stick into a monopod.
A better solution would be to epoxy a 1/4" BSW threaded nut (standard camera tripod thread) onto the bottom of any brush, then instead of a brushstick you buy a cheap monopod, screw camera on for video, screw the brush on for brushing duties, bingo.
An ultrapod would be great for this. I've used it closed up and the velcro strap taking photos with an SLR and it's rock solid.
Part 2. No Johnny Brown jingle, but contains Bob the Builder instead. First one is funnier.
Nice work, this is the county of my origin. In fact my first ever days climbing was at Markfield Quarry! Where are these problems? I'd be interested to know. Thanks