I'm hoping that there will be a work weekend in the spring next year. It was nice to come and do a bit of work with a few people. There were friends I missed seeing, though.
If it's the last full weekend in April, then it's the 22nd to the 24th. If it's the last weekend that begins in April, then it's the 29th, 30th, and May 1st.
There will always be a COVID variant, just like there are always flu variants. Get vaccinated (no, it's not perfectly safe, so use your judgment if you're young), take Vitamin D (at least 5000 IU in the summer, 8-10K IU in winter), and you'll be as fine as anybody can be. If you're really worried, stay outdoors -- the risk there is minimal.