I’m pretty sure your problem is that the antenna amplifier is not turned on (where the TV cable plugs in). Our new 3100 gets over 30 channels (between Cincinnati and Dayton). It gets none with the antenna amplifier off. Rotating the antenna probably helps in some areas, but here, the reception is the same regardless of antenna direction. And the Samsung HD TV is terrific. On our Route 66 trip,
http://www.mytripjournal.com/HistoricRoute66 in our prior 2900, we got TV reception everywhere except Meteor Crater RV Park in Winslow, AZ (no cable either – wouldn’t stay there again). We used an analog-digital converter then. Although a bit of a hassle to search for channels, but we never had a problem. Also, we were on some fairly rough roads on Route 66 and never experienced noise from the antenna. In fact in 30 years of RVing in motorhomes, we have never noticed noise from an antenna.
As for a ladder, I wouldn’t want to be without one. I’m frequently on the roof – recently installed vent covers. I regularly check caulking for leaks and wash the roof. The roof rack helps an old guy like me when getting on and off, and I think it adds to the looks of the coach. In all the years we’ve owned motorhomes, we’ve never had a roof leak from the ladder, rack, antenna or anywhere else. I do, however, keep a close watch on all the seals. As for access to storage behind the ladder, I removed all the hooks, anchors and straps, and store our chairs there, so I’m not in it too often. I keep all hoses and electric cords in the storage area under the 3100 slideout.
Check the antenna amplifier and you’ll get good reception.