Several items
Trailering your boat will probably go OK with your van, but remember that front wheel drive vehicles generally don't do as well towing as rear wheel drives (harder on the transmissions and traction issues.) Make sure the trailer tires are rated for the load - some folks just replace with car tires, and that is NOT a good thing, especially with single-axle trailers (they weave and are hard on sidewalls.) Make sure you have a good spare, and it's a good idea to have a spare hub and bearing assembly ready to go also. Have your mechanic check the grease seals and bearings on the trailer hubs, and, especially at first, stop every so often to feel the hubs - they can be warm, but should not ever get hot to the touch. Tongue weight should probably be 300 to 400 lbs with that rig. Generally the rule of thumb is about 10% of trailer gross weight. Leave plenty of room in front of you for stopping, especially on the highway. Sooner or later you will be faced with a semi-panic-stop situation, and you will be glad for every extra foot then. Good luck - you will like that boat.