David,
Another good question.
We do put some heavy stuff in the overhead cabinets. HOWEVER, we don't put a LOT of it all in ONE cabinet. We tend to spread out the load/weights. Ours are pretty much full.
As far as not giving up the fireplace, Montana Sky will understand, when I say, there is only ONE of him, there are TWO of us, and of course, the kids (yorks). He has less clothing and stuff to stow away, just cause there is only one person in that rig. He can stretch that storage space a lot more than 2 people can.
As far as the glass fronts, not sure they are glass, might be plastic. IF you pack correctly, you will not have stuff shifting around in there. Many of us will use stuff like paper towels and toilet paper to "stuff" empty spots so stuff does not shift. I have had a bit of stuff shift, but believe me, compared to our old TT, this little shifting is NOTHING! I have 3 cabinets I velcro shut: the one under the TV where yorkie central is (fireplace), I think the latches are not lined up, and we just never have bothered to look, grab the velcro. That one opens almost every trip, go figure, yorkie crates don't weigh that much.
Also the 2 cabinets across the back I velcro, mainly because they are behind the slides,and if they open and something falls out, it could get ugly. (That said, I try to always open the slides just enough to walk back there, and really look hard for any thing that is on the floor that does not belong, then finish opening the slides). We did have the cabinet over the desk open on I 10 (before air pin), and there was stuff all over the place. I had to climb over the sink and use a stick to move things around so we could open the slides. Since I tend to put books and computer stuff in there, and that is the cubboard I do load the heaviest, that one got velcroed REAL fast. Since then, I try to NOT load it quite as heavy, putting some of the research books and stuff in other cabinets, including the washer/dryer closet. The chucking we experienced on I 10 chucked those books right up against the doors and popped em open.
We have heard very few reports of actually breaking the glass in the doors. Have had a few reports of the glass coming out, it is put in with a form of hot glue at the factory. We had one repaired by the service center and since then I have added a bit of hot glue to some others I thought were a bit thin.
Hope that helps.
(If you guys get a chance, you should take a trip to Goshen and go through the plant, that will really help you visualize. Also, attend a rally, even if you stay in a hotel/motel, come out and look at us in action in our rigs)
Cheers,
Carol