The food and organisation worked well for us.
We did also get confused at the old bridge in Monmouth and spent some ten mins scratching our heads. Weren't sure whether to cross the old bridge with the arch or not, Erica was looking for a right to Garway, only later realising that this was a later section. To be fair, it was the first time she'd read a routesheet and was occasionally asking me "What's MRB?". It was folded so she didn't see the key/legend/glossary.
As it turned out, when we later came to the real TR $ Garway, after crossing the river Monnow, we couldn't see a signpost for Garway, just a CP sign. Took it anyway as the GPS said it was right.
Normally I plan ahead and go through the RS with an online map, dropping into Google Street view to spot and memorise any turns that aren't obvious. If I'd had time last week to do that I think we'd have been fine.
Also disappointed we were caught in several long traffic queues coming into Monmouth. Nobody's fault really, but we were loving that downhill. Still, we had a blast.