they're not really waterproof though are they? i had to put a big tarp over mine last time, which rather detracts from the ease of use thing, if got a stand up day tent this time, no idea whether it will work, or if i will work out how to put it up - great thing is is gonna be so sunny it doesn't matter
on the the contrary. mine's 3m x 3m and only cost 15 quid from a, now defunct, cheapo diy store but it's got me and my mates through 4 years of green man downpours unscathed.
there's no finer feeling than sitting smug as buggers under plastic quaffing champagne and eating steak for breakfast whilst everyone else is pissed off and wet.
Last year my Green Man would have been a washout if it weren't for the gazebo I took. I bought a tarpaulin and some top notch tent pegs, as well as some gazebo sides, and made a waterproof gazebo big enough for about ten of us to sit around in. It was a Godsend with last year's rain. This year, whether it's a downpour or blazing sunshine, the cover will still be a bonus.
The slightly more expensive option is a day tent, which are about a hundred quid, but look to be the bee's knees.