Gus,
First of all, welcome to PPRuNe!
Second, Rotax engines don't drone, they buzz!
As for your question, there are a few possibilities. Book several weeks in advance is the easiest one (I think, judging from what you've said, that the reason you can't hire is because the planes are fully booked up, and not because the school won't hire to pilots unless they're undertaking instruction???) Of course, the disadvantage of that is that you don't know what the weather will be like - so book for every weekend, and fly whenever the weather's good enough!
Or you could do some more training. A taildragger check-out will make you a better pilot, open the door to a whole new bunch of interesting aircraft, and may even let you fly aircraft which are less fully booked on good-weather days. An IMC rating would be nice - but why waste such nice weather by not looking out of the window - leave that one till the winter!
Depending how much money you have in the bank, though, the best solution would be to buy a share in an aircraft. Then, you have far better availability. And, depending on the type, it'll probably be much cheaper per hour to fly, which will encourage you to fly more.
Try to arrange to go to fly-ins (we had a very successful PPRuNe fly-in a month ago, and I'm sure someone will arrange another one some time, but there are fly-ins all over the country regularly), arrange to fly passengers, arrange to fly with other pilots - all things which force you to book the aircraft in advance. Of course, some of the things you book you'll have to cancel because of the weather, but that can't be helped.
Good luck!
FFF
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