Suggestions for roomiest floorplan for 8

You didn't state the ages of the 8, or how long the stays would be, and that makes a difference, but for 8 people I would be looking at the largest model I could find. Probably a park model since you don't plan on moving it.

Sorry, ages range of 6 kids from 6-18 and we stay weekends.

If your park allows it, get a park model.

A park model will give you the most room, but it will be tight with 8 people. You're going to be limited to 1 BR and maybe a loft. Don't expect the loft to be useful for anything but sleeping or storage and marginal for that. Perhaps plan for some outside living space, a deck or something. A park model is going to be 400sf or less. We feel OK in ours with 2 of us but 8? I don't know.

Anyone have knowledge on Park Models as far as the best manufacturers etc?

We have a park model at our seasonal campground. Has two lofts in it, one with a door, but that would really be useful for 2 smaller children who don't spread out a lot. The other loft could fit maybe two more. We built a screened in porch and have curtains up so in a pinch someone could sleep out there (it's 12 by 24) but I can't imagine doing that all the time. Our park model is a Heritage, custom built. Came in cheaper than a Kropf or Woodland Park, and had the floorplan DW wanted. "Best" manufacturers are relative, if $$$ are no object. They all have similar specs. (We had the additional insulation put in ours and have used it in the winter in 20 below weather.) Be prepared to spend at least $50,000 if buying new.

I really think you'd be better off with a bunkhouse style destination trailer, there are models with 4 bunks I believe, and would cost less, with more nooks and crannies for storage. Downside is that they are not built as heavy as they are still designed to be on the road.

forgot to mention: Park models on seasonal campgrounds really tie you to that campground. It's not going to be that cheap to move a park model with skirting, a deck, etc, so if the cost to camp doubles...

They also weigh upwards of 18-20,000 lbs. For us, we had a pad put in so it would not "settle" and creak/crack. Built much more like a house with all that entails. Definitely long-term "investment".

In another current thread I suggested a park model and the response was that it did not have the room or storage room of a 5er. as said, lofts sort of cheat the 399 sq ft rule. and when I was looking at them at the wisconsin dells many /most had built an adjacent screened in porch the size of the park model which were squished up against the PM with some foam/etc. to make bug proof but they could NOT be attached to the PM.
bumpy

We would love to have a park model but don't have a ton to spend and want to make sure it is a wise investment long term.

Holiday Inn

Look at the Facebook page of Fulltime Families, they might have better suggestions