I had friends that were on some of those crews for summer jobs. They explained it as a couple people working and a whole lot of people just sitting around or screwing around riding ATV’sHa - NP/Clearwater spent wheelbarrows of money on this 15-20 years ago. Then they built an ATV trail system right on top of it.
I’ve got a couple favorite spots I elk hunt that have reclaimed roads. It’s pure suck hiking them due to amount of crap they placed in the old road beds.
Another area I used to hunt had all the culverts ripped out and huge ditches left in their place. They were awful for sliding, filling full of sediment, etc. I’m not a hydrologist but it seemed way worse for water than when they had a culvert
I’m almost always good with just putting up a gate and letting nature do it’s thing