Hope my 2 cents worth helps in the bunks decision area!
We just bought a 2004 29 foot Wilderness Yukon TT, no slides. It has a front queen for Dad and I, but 2 bunks in the back for the kids. I finally decided on the bunks because I didn't want to be making/taking apart beds 2X/day. Dad and I are early risers, so we can make our coffee and either sit inside or outside and enjoy it without bothering the kids (10 yr old boy and 11.5 yr old girl) too badly. Granted, they only have a curtain for privacy, but it works for us. So far, we've only been able to take it out for short jaunts due to work/school/sports schedules. We also have 2 dogs that go with us. One curls up alongside the queen bed, and the other stretches out in front of the couch. Sometimes they are in the way, especially in bad weather or if we're all inside at the same time. But, we opted to go with no-slides due to the weight thing. We pull with a '98 Ford Expedition, and couldn't go too heavy. If we knew we'd have more time to spend in it (at present time), we would have looked into slides a little more.
As far as the bunks, the kids LOVE them! Our daughter took the bottom bunk, which can be lifted up and accessed through a small "bike door" on the driver's side of the trailer. Our son took the top. They take their toys/books along in canvas tote bags and when they're not playing with them, they stay at the bottom of the bunks, out of the way. Our bunks have a weight limit of 150 lbs., according to the label on them. I have tried the bottom one out, it was quite comfy, and I'm not a small gal!
I didn't bother with bedding for them. I covered them with sheets just to hide the mattress, but bought fleece sleeping bags at LL Bean for $20 each and that's what they used in warm weather. We used it for the last time over Thanksgiving, it was awful cold here in northern VA, and I finally made them up with sheets/blankets/down alternative comforters.
Word to potential bunk buyers: we do have a small condensation problem along the back/sides of the bunks; I assume due to poor air circulation and the fact that they're tucked into the back corner so are in close contact with 2 outside walls of the TT. Our kids' comforters felt slightly damp, but not soaked, and the kids were toasty warm regardless. I just told them to leave the moisture areas? alone (you know kids) and we pulled the comforters back so the air could get in there better during the day. The temps during the night on this last trip got into the 'teens and we had some snow one night, so I won't complain about it because it IS an Ultralite TT! We've only had it since Sept. and we're still in the honeymoon period I guess, but we're extremely happy with it so far!
LuAnn