Nicholas:
I thought I replied, but I couldn't see my post, so I'll try again.
You didn't tell me your size; you should be fairly athletic to be able to handle your H18M by yourself. Not a Lance Armstrong, but fairly athletic. I'm 57 and weigh about 170 lbs. I can easily tighten my main with one hand while holding the tiller. I solo much of the time; as you get older you find the women in your life can't be bothered with getting wet or enjoying the excitement of flying a hull.
Then I make it easy on myself by hoisting the mainsail before I pull the trailer down to the beach and back the trailer into the water (never put the stern of the boat to the wind) and anchor it (to the windward bow) while I return the trailer and the tractor.
I check all the lines and fittings; put the daggerboards in the wells (do not lower them yet); make sure I have my lifejacket on; normally carry a radio, GPS, compass, paddle, and cooler full of beverages.
If the winds are over 15k., I won't go out without a buddy, we'll try to double up whenever we can. When it's over 22, we put three bodies on board.
I'll furl the jib if I'm caught out there in something over 18k. I'll return the boat slowly to the beach if I'm alone, and make sure I drag it up enough to take everything down safely.
Safety is the key: I've had to get my boat back over a few times (Yes, you will get hit with a gust someday) and I couldn't have done it without a righting pole. Don't even think of trying to do it without it unless you're about 250 lbs.
I think it's fun...
Wyatt
www.wnycatamaran.org