To the OP:
If you may think you want to keep the TC for other trips around North America after the planned Alaska trip or plan to go to Alaska etc again, Don't Rent! It's a money hole you pour your wallets contents in to! It's like renting a home or an apartment, it's not yours, and after just 10 years, all you have is a drawer full of worthless receipts and an emptied wallet and you'll not get a cent in return other than a possible remaining portion of a security deposit.
Owning a TC is extremely cheap! Texas, I understand, is like here as no yearly registration is required and no costs ever. Very low insurance costs too and much cheaper than insurance cost each time you rent one over abd over. Our policy on our 11'4" Lance is added to our vehicle policy for less than $70/yr. It has a $100 deductible standard and covers $2000 for any and all personal contents before the homeowners with their deductible would begin to kick in. Also gives a $2000 trip interruption coverage if you can't use your TC while traveling for about any true reason.
On top of that, you will own the TC and can use it any time you want to and as much as you want to at NO costs and still sell it and recoup most of your money when desired. You can go about anywhere and camp or even boondock in places you can get to with a MH or large pull behind and not assault your wallet so you can do it so much more often. You won't even be noticed when parked in a parking lot like a big RV is. You'll fit in with the other normal shopping parkers. It's yours to enjoy to the limits of your imagination! It also serves as a known tried and true owned backup small home if your fulltime RV needs to be taken in and fixed and you won't have use or there's weather etc damage.
We have always kept a min of one TC owned since 1965 and they are worth triple the money spent. Even with our always having another RV such as our MH's TT, 5th wheels, etc at the same time. One type of RV does NOT fit all needs or wants as you now know. We also took a 5th wheel to Alaska etc the first time and learned just like you have. All other long driving trips had the TC on the back of our truck. After all, most of your time is spent driving and exploring and the RV is your sleeping and cooking accomodations and contains your own totally usable bathroom just like your fulltime RV does, just on a smaller scale.
Our 3 Lance TC's purchased new since 1988 have been bullet proof and had never leaked or needed any repairs the than replacing burned out light bulbs etc and they collectively had traveled way over 200K. I can't begin to remotely say that for the 4 cheaper built TC's we owned before buying Lances. Not only cheap built but multiple leaks and rot and very poor insulation make them uncomfortable in cold temps and then to rub it in, virtually worthless when selling unlike our Lances have shown us.