Okay...can you answer "We have separated" and put up, at the party, with the sympathy and the faces? I had a tough time not crying the first while lol!!
So, think about that. Maybe "H isn't here, I am throwing this awesome bash solo, which reminds me, I meant to ___________ "(insert small task here, so you can run away or assign a task to escape)...if you don't think you can handle the "I'm so sorry..."
The boat....there were places I told H he could not bring exOW, because of the memories. So you have a few choices:
Tell H how you feel. He will respect it or not.
Sell boat
Let it go. Your memories are yours. You create new ones for you and the boys. Also I suggest learning the trailer and drop from H so you can do it yourself . Also the boys can help.