How do I copy DVR recording to laptop

It would probably be easier and better quality to just buy them - the ones she really wants. How many will she actually watch? (My DW is a hoarder- I don't subsidize that.)

I use HDMI ClonerBox to bring my Dish DVR recordings to my computer. But it is only real time. It copies to a USB stick and allows pass thru.

Well
It depends on your Cable-Co, mine (Wave) has their Motorola DVR programed to be stupid if it's powered up and not connected to the cable system and able to talk to their up-stream equipment
I learned this a couple winters ago, after a major storm outage, we got power back before the Cable-Co box upstream of us. So we couldn't watch any of the programing we had recorded.

I have a box connected to my computer (with software) that allows me to record any NTSC, clear-QAM or ATSC direct to my computer. That's the only easy way I have to record TV to an un-encoded format.

The best option is take the box with you in the RV
2nd option is real time recording using an hdmi capture device that records directly to USB stick or USB drive (drive will need to be externally powered Not USB powered)
The dvr files are encrypted, not worth the effort to try and break the encryption
That would take the NSA, no fooling it's that tough

The problems already mentioned might not be your only issue as most cable/telco providers will not allow 3rd party copy of content off of your STB as that is most likely a copyright infringement violation the cable/telco company has with the content provider in their contract. ( same generalization horton333 mentions) Generally, you are only "borrowing" the content on your DVR per your subscription, you do not own it.

You may want to look into if your cable company has TV Everywhere or OTT type of delivery within your subscription. In some cases, the apps they provide may be able to securely transfer content to the device with the resident app for a limited time. I know with my subscription, I can transfer DVR content as well as specifically marked content to something like my iPad. That content can stay on there for set amount of days without network connectivity and with proper network authentication, the content time can be extended. Might be an option for you.

The DVR will be copy protected.
You can use "screen capture" software, but I hesitate to recommend any since almost all sources for that now will have malware inserted.
You can google, but I'd suggest be ready for problems unless you can find a trusted source and they are basically all gone now.

I used to copy live programs to VHS and then re-copied to DVD with a VCR/DVD unit, but it was labor intensive to remove commercials and stuff. That unit has worn out now, anyway.

The problem is probably going to be copy protection built in to the DVR and attempts to copy likely will fair.

If the shows are on the cable box, just take it with you? If they're actually stored on the cable company's network, then your real time recording is the only method.

There isn't going to be a high speed download method to copy the shows off the box, they are either encrypted or in a proprietary format, to prevent just what you're trying to do :(

You can get a HDMI to USB capture device, used by Xbox and Playstation guys to record their games. It will still be a real time download, but will be much better than a DVD copy.

Don't know if streaming is an option for you, but many cable co let you stream previously aired shows from their website.