Good advice above here. I strongly second the advice to get a current paper road usage map from either the USFS or BLM or both depending on where you are headed. OnX is good but you'll have a lot riding on that information. The best road use maps are usually weak at showing topo so you'll probably want to have both types handy. Odds are you'll be fine, I run a 3/4 ton all around here yearround but often just use it to get my ATV, bike, or boots to a farther out trailhead. Plus my truck does gain some Colorado pinstripes every year. Chains are a good idea and very helpful if it turns very sloppy or you get hit with deep snow. Plan for not needing them, but if you do need them they can save your bacon. If you only have two, I recommend putting them on the front where the weight is. And practicing putting (and keeping) chains on is also a good idea. I've gone 3 years without needing mine but will probably jinx myself by writing that. I'm sure it goes without saying to not take your truck on a path it is not allowed either by designated use or seasonal closure. You should not run into any seasonal closures in Sep, but I can't keep track of what the FS and BLM are up to lately. Best of luck to you!