Nothing wrong with using a ramp as mechanical advantage to load the RTT. As you pointed out, sometimes the convenience of doing it on your own far outweighs the percieved convenience of getting friends to lift something by brute force. Lifting something that high that is big and bulky could easily damage your vehicle or yourself/friends if something slips.
Just keep track of who is giving you a hard time and give them a friendly jab back when they post getting stuck and use a winch or traction boards to get out

We all like giving eachother a hard time - "Why did you use a winch - don't you have any friends to come push you out?" "oh you only had five friends, I have a hundred friends who are power lifters to push me out when I get stuck

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