Hi Don,
Like Ken says, make the effort to contact the owner/operator of the ALA prior, this courtesy is esp appropriate with private strips. The same courtesy is not req'd for your larger more public aerodromes. However, once down and parked one should make the effort to locate the owner/manager to settle your dues. The bonus here is that you meet new people and make new friends, and you'll know you will be welcome back there. Some of the larger fields you'll often find no-one around which is really tough because there's no-one to give your money to.
How do you locate these owners? The ERSA lists info for most of the strips you're likely to use, but there are many that do not list here. Get yourself an AOPA National Airfield Directory from http://www.aopa.com.au/website/afdorder.cfmat a cost of $50. This lists most strips in Oz, but not all. Chances are, the ones not listed that you may want to use will be by invitation only anyway.
Both the ERSA and the AOPA directory detail info about the airfield, landing fees, fuel availability, contact names and numbers, etc. The AOPA directory is more informative with stuff like nearest town, accommodation, and so on.
From my experience, when you talk to owners in advance they are friendly enough and usually offerhelpful advicebased on local knowledge. It pays to double check stuff like co-ords, elev, and rwynums while you're talking with them too. When Gwen and I did a flight through the outback last Sept one of our stops was at Wilpena Pound. From the AOPA directory we noted all the relevant strip info for the flt plan and GPS set-up. However, in flight at about 30 mins out I contacted their chief pilot by mobile and just happened to mention the rwy nums we had in the conversation. To my alarm he said "Mate, you've got the wrong airfield. We are .......".What we didn't knowwas thereis another strip about 15 milesfrom Wilpena with different elev and different rwy nums. The AOPA book incorrectly listed all the strip data for this unknown field under their listing for Wilpena. Anyway, it made for an interesting "seek and ye shall find" scenario as neither strip is indicated on the WAC.
Paul