can anyone recommend going to Scotland for a weekend of family skiing and boarding?

The original question was "Can anyone recommend a decent resort and place to stay sometime during March?" The first answer is that snow is not guaranteed during March (or any other month) so it is unwise to book a place thinking there will be. Usually there is and if you book ahead with the attitude that you'll have a good outdoors holiday even if there's no snow you'll be happy. I think it was the season before last there was no snow in March then it came again in April. Last season it was 5 metres deep on the West, less so on the East. Totally unpredictable like all British weather. There are five ski areas. Aviemore/Cairngorm has been mentioned and is the main resort town but Fort william on the West is only a few miles from the newer area of Nevis Range which has a gondola and chairlift (rather than cramped funicular and aged drag lifts) and spectacular views over the West coast. Glencoe, half an hour south, is a second option if you base yourself there. The Lecht is a second more distant option if you stay in Aviemore and have transport - it has the cheapest lift tickets and is the easiest (along with Glenshee) to get straight on the slopes from the car park. Only other point of note is that IF snow is good these centres are likely to be heaving at weekends, with long queues, but fairly empty midweek.

Snowhunter gives a wider resort and conditions perspective. However, snow depth is perhaps a lesser issue. Conditions in terms of sufficient snow depth is only part of the story. The major reason for resort closures is high winds, and access roads closed due to being blocked by snow.
Road closure is not a function of the amount of snow falling, but of generally persistent wind conditions causing drifts. Piste machines are often diverted off the mountain to help clear the roads.

True, but sadly too much snow with resulting drifting problems, though it still happens occasionally, maybe once every two or three seasons at each area, has been less of a cause of closure than periods with little or no snow this century. High winds stopping lifts remains fairly common though that's true - I've even been stuck at the top at Cairngorm, because it was deemed too windy to run the funicular train!

So, to summarise, no-one can recommend skiing in Scotland

Yeah I did think "I'm not really selling it..." OK I've lived here (near Inverness) 30 years and every season I get a few superb midweek, perfect blue sky, empty slope days on my local hills. Most often in April/May. When it's good it's really THE BEST IN THE WORLD. When you take in the views alone its worth it (People say, "oh the road from Vancouver to Whistler on the Sea to Sky Highway has amazing views but I did that and I thought, er, this isn't as good as the view from Glencoe or Nevis Range). Plus there's a great atmosphere, nice people. The problem is people say "I'm coming in February, how will it be?" or "I want to see in Scotland at Christmas, will there be snow?" And the short answer is - no one knows. It's the Russian Roulette of ski holidays, you may get superb conditions, you may get brown slopes, no snow. Or blizzards and gales making it unskiable. So you either have to book at short notice when you know conditions are good, or you have to come hoping you get lucky but accepting you might not and being prepared to make the best of it. Should add I am clearly a fair weather skier and should be rightly treated with contempt by hardened Scottish skiers who will brave whatever conditions are thrown at them.

You are preaching to the converted here. I cut my teeth and learned to ski at the Scottish centres, being based in Edinburgh. However, having seen what the rest of the world has to offer, I now realise how primitive it is.
I also got fed up with the blatant lies in the snow reports such as 'breezy conditions'(Howling gale), 'low cloud'(10m visibility)and 'All runs complete'(with rocks, moss, heather and rivers)!! :roll:

Gotta love those creative snow reports! LOL

Even 1m visibility! Yes. I could not see past my knees!

Yes, most years, I get some bluebird days in Scotland ~ but I don't do any planning until the day before.