Do you really need a tent for 6-8 people? If so, you should be looking for a tent that sleeps at least 12 people. The recommendations on tents are about half what it is actually comfortable to sleep. You can only fit 6 people in a 6-person tent if you put them on the ground, no air mattresses, and arranged like a game of Tetris.
We have a 12 person tent that is fantastic. It's super roomy, has 3 rooms, each of which will hold a queen size bed with room to walk around it, add a box for a nightstand, suitcase, or in my case, a porti-potty at the foot of my bed.
It's an "instant tent" meaning the poles stay attached to it and it literally goes up and down in a couple of minutes. It's honestly quite amazing. I didn't believe it until we did it ourselves. I know Coleman and Ozark Trail make these instant tents now as well. Our Bushnell is 18' x 11' and has a great "foyer" area outside the door that is covered and has a floor to put a mat. There are shoe holder pockets on both sides of foyer. Or you can use them for Off spray/ flashlights, whatever.
We add waterproofing spray as soon as we got it, as we do with all of our tents, but has held 100% dry during some serious Florida downpours. I didn't have to use any seam sealer because the seams on this tent are doubled over in a way that makes them nearly impossible to leak unless you cut them. Much better even, than taped seams. When we originally purchased, I was skeptical, due to no bathtub floor. However, the style of seaming makes unnecessary.
The rain fly sits about 12" or maybe a bit more, above the top, making for great air flow. Absolutely none of that "muggy" feeling in the mornings that you get with most tents. I always hated that blankets felt damp and needed aired, with our other tents.
This tent is easier set up than our camper, so we take it on weekend trips or when we are going to more rugged places. I've been very happy with it. Bushnell, as well as the other brands mentioned, make smaller versions of instant tents if this is larger than you wanted to have. We paid $300 for it, but now is a bit cheaper but comes as a bundle with 2 queen air mattresses and 4 chairs - a very good deal.
Click here.
This first photo is when we timed our first set-up out of the box. I think it was just around 2 minutes ... but that was without the rain fly. DH put all those guy lines out, but they are completely unnecessary, and I was annoyed that he didn't leave them in their perfect little bundles. We have never put them out since.
Without rain fly:
Camping:
Inside - this is one room, has porta potty at foot of bed and space for nightstand with queen sized air mattress.
Whatever you decide to go with - for ease of set-up and break down - I highly recommend an instant tent. Good luck!