Yes- the hose (coming out of the side of my camper) is already plumbed into the main gas line underneath my camper. The hard line comes up through the floor and into the cavity below the seat where it connects to the flexible line that goes outside. It came from the factory that way (outside stove option) and has the same quick-connect as the inside.
However, you probably could tap into the hard line under your camper and make a similar setup for your 'outside' stove. OR, see if Coleman (check Camping World online too) makes a longer hose assembly (10+ feet?) and just zip-tie it to the camper frame to go from the tank to where you need it. Many options are possible depending on your skill level and budget.
As far as a solar phone charger- check this out. I've had one for many years (it was gift), and used the hell out of it. They're inexpensive, they come with 6-or-so different connectors (they have as list of all the phones that their product hooks to) and it works **** good.
They sell them on Amazon. The site I provided is the manufacturers site that gives specifics on the device.