NSCAN and RAMP Mobile Access Points

Hello,
 
We are going to be performing in 3 new venues that are off-campus from our main productions during our festival.  Two will be in museum spaces and one will be in a theater.  When we are on-campus we are able to connect our scanners to the same wifi network which has been white listed for use by RAMP.  Where we are having difficulty is when we are off-campus.  Since we most likely won't be able to know the IP addresses in advance to get them white listed does anyone have any recommendations or suggestions for devices that we could use and get a static IP?  We've looked at a couple by Verizon where you can pay extra for a static IP but I was tasked to see if there is something you know others may have used successfully in the past.  We would only have 2 or 3 scanners at each location so it wouldn't be too much traffic.  Any suggestions/recommendations?  Has anyone else been through something like this?
 
Thanks

Michael