A Peplink Max BR1 or Transit modem/router and an antenna on the roof will get you any cell signal to be had, far better than a hotspot device or phone.
If you must have service, you can't depend on only one method, whether cell or satellite.
Best answer so far.
I think the challenge is that most users are not geeks and just want something they can plug in, turn on, and just connect gadgets and tv's with. The advertising for every solution on the market is baffling to the average user. Even for an advanced user, very misleading in the best of cases.
The best way I can describe Peplink is: it's not an end all be all solution. It is a hardware investment that serves as a foundation, giving the user that uniform turn on and connect to experience. You still have to subscribe and connect your desired internet gateway(s) to complete the package (and this is also your ongoing expense). Where it shines is that you can make it as robust as your budget allows, and have the control to adjust that as your needs change.
I use a 4G Peplink Mini (2xsim + 2xRJ45 + wifi5). I connect to campground wifi as primary, and have a Verizon sim for backup. If wifi fails, it drops to Verizon until wifi comes back. I spend $40 a month for the VZW data plan, and sometimes a small fee to access campground wifi in some places. Cheap, works ok for my needs, just not enough for 4k tv, video conferences, etc.
The particular Peplink I'm using is also at the cheap end. It's 4G only. I bought a new old stock one off eBay, and added the extended feature license (one time fee) for a total of $265 all in. Since it's 4G, I have it patched into the Winegard 360+ rooftop antenna my camper came with.
They offer 5G models for a lot more money. Those require a 5G antenna, so that's another upgrade and cost. If you need big speed, that's what it takes. Fortunately I don't need that, so far LOL.
Peplink has a bonding feature that would cost most users less than $5 a month. It merges the available internet connections to offer a more stable connection for streaming and video for example. I would use it if I needed to be on Zoom calls. I still don't need mega bandwidth, and the bonding would prevent signal drops. On mine, it would use and balance both campground wifi and VZW at the same time to give me a much more stable connection. Truth be told, I have not had any problem using one or the other, so never have configured this feature. I'm sure the time will come, eventually.
If I needed speed and/or a more bullet proof option, I'd subscribe to Starlink and patch it into one of my wired ports. Adding it to the mix of options. Or if traveling somewhere Verizon doesn't cover, consider getting an AT&T or T-mobile sim since I have an extra slot for it. I hear more positive reports from T-moble users over AT&T, so that's probably what I'd get if I did this. Any change like this would be invisible to my devices. TV, phone, laptop will still connect to the same wifi access as always. Seamless. The only change would be how that data gets to/from the internet, behind the scenes.
You don't need to be a tech genius to set it up. Mobilemusthave offers config service for a small fee. If you have smart grandkids, they can probably do it for free. It's not brain surgery, but you do need moderate tech aptitude to figure it out. If you're willing to endure that, you'll have a much more consistently working internet system to use.
Edit to add: I also have my Peplink powered off 12V. It's on all the time, even when parked in storage or going down the road. Last trip out, my wife had some laptop work she needed to do using a VPN to her office. It worked flawlessly on VZW going down the road. Right now the camper is sitting in storage, connected to wifi that the host offers. I can see how hot it is inside. Or, my usual habit is to run out the day before a trip with the bikes and some linens, and turn on the fridge while I'm in there (plugged into a 120V 15A post). i can verify remotely that the fridge is cooling down and ready when we head out with perishables the next morning. Checked it just now - it was a little warm today. Only a small dehumidifier is running in there while in storage.