Here is what we use and how we store the 5 lb LP refillable tank on our T2499 camper as we towed it with a Suburban and did not want the gas inside like you stated. Now that we have a PU, still use everything the same, just the LP tank goes in the truck bed.
I do have an adapter to tie into the main 30 # tank if I ever run out on the trip. For cost, getting a good refillable tank is the way to go. 5#, 10# or 20 # and to find a place the refills them by the pound or gallon of propane filled. This can be the hardest part. A lot of places refill the 20# home BBQ tanks but charge the same cost for a 5# tank. I luckily have a nursery about 5 minutes from the house that refills by the pound. It too did not like going the little green 1 lb disposable tanks.
The grill is a Weber Go Any Ware grill. This was the model before the Q’s came out but they still sell them. If and when this one ever wears out, now going on 5 years, we will most likely get one of the Q series grills (Baby Q) as I now have a PU truck bed to haul it in. The only down fall I have found to the Go Any Ware grill is the actual gas regulator. I am now on my 3rd replacement regulator.
Here are some pics of the setup.
Hope this helps
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
Google Custom Search For Sunline Owners Club