First make sure you have the boat in a spot a trailer can back up to. If it is in your back yard in the grass you might want to move it onto the driveway or road in front of the house. This will keep your grass and landscaping from getting ruts if the ground is soft.
You will want to make sure there is air in the tires so the boat and trailer can be moved out of your yard. If the trailer is old and rusted, inspect it to see if the tires are worn or dry rotted then mention that to the person that is picking it up. If you have a spare tire you can place that on the boat as well. You do not want the boat trailer on public streets falling apart and causing accidents.
It is important that you remove your personal items before you donate a boat; box up the old life preservers, sunglasses, lotions, maps, credit card receipts, repair receipts, clothing, fishing rods, insurance papers, registration cards and water skis and put them in your basement or garage as they do not need to go with the boat.
Tape your ignition key to the glove box. If you have a boat cover you can either put it on the boat if it is in good shape or leave it folded up in the back if it is torn and can possibly fall off. If you have cans of oil, spare parts, or old gas cans take those out of the boat. They won't need to go with the donation and they could be hazardous.
If you have taken apart the engine, the outdrive, steering cables, swim platform or other important parts of the boat then place those in a box in the back of the boat. If you've stored extra sails, rudder, or cushions in your garage then be sure to hand those items to the person picking up the boat. A box or hefty bag will work as storage and allow those items to be transported.
Remember: it is best to donate your boat while it still has some value before the ravages of time have devalued it. You can call Boat Angel at 800-227-2643. Thank you all for the boat donations.