Pre-purchase question from newbie

[EricHarmon]

Good morning, all, and Happy Thanksgiving!

My wife and I are in the research stages of purchasing our first 5th wheel. This will be used for full-time living. We haven't decided yet whether I'm going to work a little bit from the road (I'm a software developer) or if we're just going to retire for good.

After researching and looking at numerous options, we've decided on Montana but have yet to select a definitive floor plan. Different floor plans have different appeal to me (The 3950BR has the bonus room that I could use for an office if I decide to continue working a few hours a week, for example).

One question that keeps nagging at me is the question of length, for two reasons, and I'm hoping that someone might be able to offer some suggestions here.

1) I see that some campsites around the US have a 40' limit on trailer length. While I don't envision us hardly ever boondocking, we will be traveling the entire country including Alaska, and I don't want to make it needlessly difficult to find an RV park. If we get a model that is, say, 40' 9", do you envision that making our lives a lot more complicated than if we get a model that is 39' 6"?

2) Other than towing a car behind a UHaul truck a couple times when moving, and towing a flatbed trailer behind a Chevy Suburban on rare occasions, I currently have no towing experience. Of course I will practice practice practice in an empty parking lot before heading out on the road for any serious travel. I'm wondering, though, if a 40' model is going to be noticeably more difficult to tow than, say, a 35' or 36' model? I don't see us settling on anything shorter than about 36', so I'm wondering whether for all intent and purpose I can consider a 36' RV to be the same as a 39' or 40' RV in terms of towing experience, difficulty, and so on.

Thank you so much in advance for any advice that you can offer, and I hope you all have a blessed and safe Thanksgiving :-)