First of all, a nugget of information; Good Friday is on the 03rd April 2015 so if you have kids to consider this is a big help, if you don't you have any fathers in the group you can skip this paragraph, oh it's too late you've already read it!
Another tip, if you don't like getting wet (you big Jessie, but I understand) book 'indoor' daytime activities, such as; indoor karts, indoor bubble football, indoor paintball, the zombie bootcamp or cider tasting!
Let's start with the UK
Go North to Edinburgh for similar activities or Newcastle for amazing nightlife or south to Bournemouth for crazy activity filled days so good, you'll need another stag weekend just to get over this one!
Newquay is a bit quiet in March and you'll find quite a few bars and clubs closed for the winter season, so I wouldn't necessarily recommend Newquay in March for lively nightlife, saying that, awesome for surfing or coasteering and chilled out, 'out of season' nightlife.
Busier destinations in March for the UK are Bristol, Manchester, Newcastle and Nottingham.
If you are looking for a horse racing event you have the amazing Cheltenham Gold Cup (book early!) you also have Chepstow ideal for a stag weekend in Bristol or Cardiff (both within 45 minutes drive).
Europe From East to South
There is nothing better than going abroad for a stag do, from drinking in the squares of Old Eastern European countries to hopefully sitting in the sun in Spain, stags just simply love to travel.
There are loads of stag activities in any of the above mentioned stag destinations, including shooting AK47's, racing snow mobiles, driving tanks and cruising around in old Russian cars, you also have amazing nightclubs, incredible bars and lap dancing clubs that will put hairs on your chest.
If you need the sun, then travel south and the furthest southern European destination where you almost guaranteed sunshine in March is the Canary islands, however if your budget doesn't stretch that far or you don't fancy spending 4½ hours each way on a plane, the Algarve or Costa Del Sol are also great places to soak up a bit of Spring sun.
Wherever you choose to go or whatever you want to do I am sure on the DesignaVenture stag do section of this website you'll find a humongous amount of stag ideas and packages you'll want to snap up, tens of thousands of stags each year can't be wrong.