Spent much of it rechecking caches wading through water and crawling up tunnels, one I tried when I was 10 but gave up. This became a place for another cache and even found a quick way back in if I need to perform maintenance. This place even led to my old back garden which was cool.
Then looked at a few places to place the very last one which will involve keys, locks and stuff used so far, plus a few new bits. Problem is all the work needed to get this in place so probably be another weekend.
Already have several favourites on my first in the series as well as an attempt on number two. All have to be done in order to do the next stage and so forth.