I've stayed at grizedale a few times a year for the last four or five years.
It's a superb site,my favourite in the lakes, primarily due to the owner, Arthur, a farmer who had diversified and is always friendly and helpful, and the fact he allows open fires.
The pods are excellent, please dont listen to redandshane who has never stayed in one!
I'm a keen camper, but out of season, especially when it's wet or if you're only staying one night, pods are excellent for the following reasons:
No tent to put up in the dark / wet
Nice and dry and quiet, whatever the weather
No wet tent to pack, take home, unpack, dry out, pack again
No risk of getting flooded out.
Apart from the above, it's just like being in a tent! All the positives, none of the negatives. In summer, I take the oztent, but from oct - march a pod's a far better alternative.
The site's in a pretty good location, as mentioned 10 mins to a pub, couple miles to the visitor centre at grizedale, bit further to hawkeshead for a bit more to do.
I can wholeheartedly recommend the site, the pods, and if you're in a group, the yurts. Arthur (the owner) is one of a kind, He's had a rough couple of years with the weather and personal problems, but always has time for a chat and a laugh... how many campsite owners are like that?