[txmatt]

Depending on what you're using propane for, you can use a 5# propane cylinder on the tongue instead of a 20#. Heat and/or propane fridge would probably require a 20#, but 5# will get you lots of cooking on a stove. Every little bit helps with lightening tongue weight, as long as it doesn't make the rig unstable. You usually don't want to go with tongue weight under 10% of total weight on US trailers or you may get more pronounced sway.