Information on 2000 Spinnaker M-33RLBW: Insulation & Texas full-timing?

[VerySincere]

Does anyone know much about the construction and insulation features of the 2000 M-33RLBW Spinnaker model? I've seen the specs on the consignment reseller website and I'm very attracted by features and price----and I'm willing to do some work on weatherizing it.

What were they using for wall insulation back in 2000? Could it be saggy fiberglass insulation? If so, will I need to open the walls from the outside to update/repair the insulation? (Or would it be an inside wall access?) If outside, is it likely to be basic rivets or can I count on screws?

I'd like to know more about how its built before making the trip. (And I checked on the Internet Wayback Machine but there is nothing for ForestRiver before 2006 on their snapshots.)

I'm interested in any and all feedback on Spinnaker line in general around the year 2000.