Budget hobbies, easy on the lifting. As I approach retirement, I have been thinking about the very same thing. One of my older brothers said that I shouldn't make a lot of big plans. I started compiling a reading list. I have spent so much time in my career reading manuals, technical treatises and proposals that I have had nothing left for fiction. Other things I had thought to occupy my time: gardening; more time in the garden keeping it happy and last but not least, music. I own and play several instruments, so the cost for that pursuit should be minimal. Community service will take the rest of my "free" time.
Don't really know what to suggest about the party in June, though. Things that came to me were (without knowing more about your financial situation) seat sales, bus, AmTrak, and lest we forget, Days Inn.