Following yesterday's announcements, the exact dates that the seasonal attractions will be open have been added to Thorpe Park's website.I'm A Celebrity... Maze
Friday 23rd March –Sunday 15th April 2018
Friday 25th May – Sunday 3rd June 2018
Saturday 21st July – Monday 3rd September 2018SAW Alive
Saturday 21st July – Monday 3rd September 2018
It is confirmed on its page
that SAW Alive will remain open until park close after opening at 12pm, so that will mean an impressive 10 hours of operation during the late-opening summer dates which will actually be longer than when it opened at 3pm during Fright Nights, outside of half-term week. There is also nothing to suggest that it will be an upcharge attraction on the page either, although I expect admission may be a little more expensive on the 10am-10pm dates.
Interestingly, no dates have been added to Rumba Rapids' page
that would indicate a seasonal opening, although whether this means that it will actually be open all season, or if it's just that the page is yet to be updated, is unclear.