What you mean ist hiding the frame IN raid, which is possible, but here its desired to hide the party frame *always*, for which i can't find an option.

I use Pitbull for my default unit frames, and here you can just disable anything you don't like (I disabled party frames and pets and some other stuff). If you want to keep the standard frames that is also possible, since in Globald Settings you can set to show all standard blizzard frames and disable the modules alltogether. This way pitbull will behave as if it wasn't there while, if set, the party will be hidden. Though I can't tell anything about performance here. And I imagine some of the more lua-ished people can write some lines about a small addon to do this.

Just this is all advice I can give.

Edit:
I am having a small issue myself: When normally raiding I don't give a fuck about pets running around, why bother healing them. But for Malygos with Grid I need those pets, so I need them to be shown. How do you solve this? Until now I have a macro I run upon entering Malygos, but I tend to forget that... So I am either looking for a really smart solution or an addon that adjusts my grid (perhaps by running macros) by which instance I enter.

Yes this is how I basically do it, but I only want it on Malygos, since I dont need to know that little kittycat is taking damage...

Just change it once you enter Eye of Eternity ? And healing pets can sometimes (most of the time in fact, if you have the time/mana to spare) be a good dps asset.

Oi, would you throw a few extra heals at a mage if it meant ensuring he can keep doing 100% dps instead of 60%? A dead pet is terrible for a BM hunter and even if they can deal with their pet themselves, it will interfere with their dps'ing.

In addition a question to everyone: I can't seem to get the drakes on malygos show on my grid as pets. Any idea what might be wrong?

Why bother healing them? Try raiding as an SV or MM Hunter and you'll know. I know a couple of my guild's healers that at least try to keep an eye on pets' health. Not at the expense of of players' health of course, but I am grateful for even the consideration.

Nobody is forcing you to heal them whether they are showing in Grid or not. If you must hide them on the fly, though, align your Grid layout so that pets are displayed along the edge of your choice, disable clamp to screen and frame lock, and move the raid window area displaying the pets off of the screen.

I've got a question for Grid users. I would like my raid frames organized vertically along the left side of my screen, anyone know if this is possible with Grid?

I had a problem using grid when healing a hunter when had a pet that had the same name as he. Would seem like grid got confused about where to get the health value from and would switch back and forth between the pet and the hunter.

Anyone else encountered this problem, and might have a fix for it? Except for the obvious to change the name of the pet, that can be done by scroll now.

Thanks to the many answers, I now changed it so pets will always be shown, didnt think about the dps aspect, my apologies.
Regarding another thing: On 25 setting Pets are to far to the right in 10, do you change this or have you some kind of trick/automation for this thing? Or do you just dont care about the space in between.

edit: sorry... replied to old post.

You should have the option heroic raids and normal raid.
heroic->25/w
nomral->10/w

you can also but the pets on the left side if you prefer that.

thanks btw to the frost blast responses you saved us some wipes.

I don't think this is possible, unless someone has recently created an addon to do it.