Router Question -- Use my router on another network...

My family enjoys traveling in our camper.  I would like to set up a router/wireless access point that our devices are connected to within the RV but then when we have access to WiFi I would like to use the router to to deliver the WiFi as an access point.

I would like MY router to assign DHCP.  I have some ideas on how to have my devices talk to each other and stream info but I don't think it will work (nor do I want it on) someone elses network but I do want access to the WiFi when possible...

Is this possible?  Would DDWRT do something like this?
joemckameyGeneral ManagerAsked:
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JohnBusiness Consultant (Owner)Commented:
Well, generally the answer is yes.

Connect a LAN port on the Wi-Fi router to a LAN port on the access point (I assume there is one LAN port).
Optionally give the Wi-Fi router a static IP address on the access point.
Turn DHCP off on the Wi-Fi router.
Secure the Wi-Fi access to those you want.
joemckameyGeneral ManagerAuthor Commented:
The problem is I won't have physical access to the WiFi access point at the campgrounds (or other wifi access points ie Starbucks, McDonalds, etc.)
JohnBusiness Consultant (Owner)Commented:
If you have no access to the site network points, then you cannot add a router to it. Best to provide your own internet with your own hotspot
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David Johnson, CD, MVPOwnerCommented:
you can use dd-wrt to do this using a repeater bridge http://www.dd-wrt.com/wiki/index.php/Repeater_Bridge   First set it up to using client bridge mode which only will allow from wireless to wired lan .. you should check that your router will use V2 software and has a MIMO radio.
http://www.dd-wrt.com/wiki/index.php/Client_Bridged
joemckameyGeneral ManagerAuthor Commented:
Thanks guys!  I also reached out to a friend of mine and he suggested a "Travel Router" which is designed to do exactly what we are talking about and also has a usb port to stream movies etc or work as a backup device.

It can be found at http://www.hootoo.com/portable-travel-router.html ---- I am sure there are more but this one seemed really cool to me...

Thanks again!

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joemckameyGeneral ManagerAuthor Commented:
While Davids solution was good - I found that the out of the box solution would be easier.
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