We did Strasbourg over Easter as an overnight en-route to Venice. There was no handling for private light aircraft provided you arrive prior to 10pm local (after 10pm you're looking at Euro 450 for handling and night surcharge!)
The total bill for landing and overnight parking on the apron was 46 euro (32+VAT for landing, 6+VAT for overnight parking, less than 1 tonne). Not the cheapest compared to Calais and Rouen, but pretty decent value for a ‘proper’ airport with immigration and lighting and a good half-way point to Italy and Germany, especially when you consider the lighting is free of charge. If you don’t need the lighting and just need to use it as a fuel stop, then other options may be cheaper. Fuel price was fairly standard – around 2 euro/L – Just make sure you request it as early as possible as they will always prioritise commercial jet traffic. We got lucky with the fuel arriving immediately, but I’ve heard of others waiting quite a long time.
The two GA people I spoke to via
sxb.executive@aviapartner.aero (Francis and Marie-Paule) were very helpful, both over email and in-person, so just email them with your details beforehand to confirm anything you need. You can't pay fees at the airport and instead they will want to post you an invoice - Let them know your address details via email beforehand to save some ramp time. The Strasbourg airport site has the full list of charges etc
If you're going in to town (it's very pretty, so we can totally recommend it), it's about a 10-15 min walk out the gate up to the main terminal where there's a train and taxi rank (train is cheap and quick, but a taxi will cost you more than your landing fee each way – We had to get a taxi to town as we arrived late night, but on the way back we opted for a train to the airport then a 5 euro taxi from the terminal down to GA). Process for getting airside can be a little confusing, particularly if your French is rusty: You go into the GA building and if unattended you press the buzzer on the door. To the left of the door there’s a little shelf with a video camera above it – Put you pilot’s licence on that shelf for them to read and they’ll buzz you airside.