Unfortunately most of the bottles you found will never be worth more than a few pennies, even after waiting 50 years. But, that said there are some bottles from the 1960-70s era that might get collectible. Soda bottles are your best bet, and you might find a few milk bottles. Like other members said, there's always a chance that older bottles are deeper down. Once you hit the 1940-50s, there's a lot more worth keeping. What I see looks like 60s-70s.
I'm diggin through a farm dump I found on my property like that. Mostly 1940' - 60s. I have found a few jars worth keep as those were always used and re-used for years. Also some pottery bits and milk glass. Eventually I'll get to the old stuff. Keep poking around. Never know what lurks.