I planted mine in May also (Mother's Day weekend).
After a slight chance of rain tonight and tomorrow, the forecast looks pretty dry into next week. I don't know what your soil is like, but you might have a chance to plant this weekend.
If it were me, I would probably plant some of the tomato plants. We are heading into the hottest part of the year, so the plants might grow faster than they typically do in the cool Spring weather. I would think you might get a 1st crop at a minimum and possibly a second crop. We still have about 3 1/2 months before a frost (July, Aug. and Sept. are frost free, and sometimes Oct. is frost free).
Having said that though, I am just speculating because I have never planted this late in the year. I don't think I would plant 1,000 because that would be quite a disappointment if you didn't get any tomatoes.
