Have posted in Power Club, but a rundown for those who may be interested in going to Santa Gadea:
TLDR: Great climbing and hospitality and pretty good for kids. Not a huge area, but quiet and landscape around is great (better than e.g. Font).
Bouldering: Sandstone, good quality, coarser grain than e.g. Font, can be scrittly on tops. The actual climbing is technical body position dependent stuff. Get good at using slopers. Mono-slopers. Slopey slopers. The most developed area (Mordor) is pretty highball, although with good landings. Ideal for kids too as it's fairly compact with plenty of cleared grassy areas. When you've worked out how best to access (the paths can get fairly choked with ankle height gorse) it's a nice walk-in. Don't go expecting the new Font, but there's a decent variety of problems, with muchos potential for further development - rock is absolutely bloody everywhere and we found a bunch of uncleaned lines a few hundred metres from well trodden sectors.
Accommodation: We stayed at Casa Druna (see
here). Great place, fairly cheap, and wonderful owner (Marta) who was happy to show us where to find the climbing and swimming spots. Highly recommended, especially with kids (Duncan loved the menagerie outside - everything from horses and dogs to lizards and tadpoles).
Other stuff to do: Down the road (5km ish) is the Embalse del Ebro (massive reservior). It's got some decent sandy beaches, along with a smaller sub-lake next to the campsite at Arija. Ideal for swimming. Landscape around Santa Gadea is fairly open moorland, with some woods, and would offer good opportunities for a stomp although we felt that it wouldn't really suit D. Further East (20mins - 1hr drive) becomes a morass of stunning vertiginous limestone cliffs, gorges and plateaus. Some great walks and wildlife (salamanders!) that were pretty accessible, plus waterfalls, rivers, caves etc.
Other info: Watch out for ticks (I was fine but my tick-magnet mate definitely was not) and the flies can get quite annoying when there's no wind. Definitely worth at least having a little basic Spanish - there were very few English speakers around.