I just added a 256 GB iPad Pro 9.7 (wireless + cellular) to my arsenal of teleworking tools. I have it connected through a VPN and installed Office 365 which includes Word, Excel and PowerPoint as well as access to One Drive for cloud storage. I also have the AiO Remote app so the iPad (and iPhones) can print/scan to/from my HP printer.
I have been to two campgrounds where I would say I had issues with teleworking. One was 4 Paws Kingdom and they specifically state that high bandwidth users will be throttled back or disconnected so no streaming of movies etc... on their system. The other was Fort Wilderness where you had to get a modem from the outpost to connect into their WiFi. At Fort Wilderness we were on the modem waiting list until the night before we left.
I also have a Verizon MiFi which has served me well in campgrounds with weak WiFi and at Fort Wilderness. Neither my client's furnished laptop (allowing access to their VPN) nor my wife's Surface Pro are cellular capable so the MiFi comes in handy for those devices. I prefer using the MiFi rather than setting our iPhones as hot spots.
This website is a good source for information related to RV Mobile Internet access.
https://www.rvmobileinternet.com/
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