Transferring Propane?

The best answer appears to be "no, not easily or safely". Maybe a propane dealer/shop that fills these things, could answer your question. Try sending an email question, or call some of them. As someone mentioned, it's probably not worth the expense, but you'll never know if you don't ask.

Does it have a fitting on the bottom to get liquid propane?

I don't know anything about the tank on your RV. If it is a "gaseous, vapor" like a typical BBQ tank, then you can just hook the two together with appropriate hose. THIS WILL NOT FILL YOUR BBQ TANK !

To do that, you need different pressures between the two tanks. The easiest way is to make one hotter than the other. Before you open any valves, put the BBQ tank in a large container of ice water. The more I've the better. Once the tank has cooled to below 40°F, then open the valve. Pouring hot water n the other tank helps.

You will have to keep this up for about 30 minutes. Yes, that is a lot of I've !

I think the valve position is to high up on the MH tank to be able to off- load liquid propane to another tank without a pump and/or special connections.
By the time you spend money to buy what you need might end up costing more than the LP value.

Being that you and I really don’t know for sure, better to leave LP transfers to a tech that knows what he is doing. Suppose someone gives you the wrong advice ! Is it really worth it ?