Hi. My wife and I downsized from a triple slide fifth wheel and now have a twin bed LE2.
We find we can fit enough clothes in the trailer for about 2 weeks of warm to moderate temperature travel. A little less if the weather is cold.
As for food, the pantry and fridge are big enough for about 2 weeks of food. One thing to note: the new fridges have more fridge space but less freezer space then ours, so you may be more limited on the frozen side.
We have the standard black tank. 3 days if you're using it exclusively, but we've gone several weeks by using bathhouses for everything but those early morning/late night calls from Mother Nature. Expect over 2 weeks on the gray tank if using max water saving measures. If using for daily showers, etc., then probably 3 days.
You'll need an Andersen WD hitch with your truck and an LE2. We have a lot of stuff in the bed of our truck: Clam, chairs, mats, griddle, table, etc., etc. so watch your cargo weight.
We have the Platinum lithium package and love it. It's the saving grace of this trailer. Haven't used our generator for 2 years (we don't use the AC much). We also love our additional street side awning. It's one of our favorite features. Keeps the cabin much cooler and gives you shade all day long.
One final word. We may be an outlier but our 2022 Oliver has not been without issues. Some were not Oliver's fault, some are. Most minor, some major. It's a good design using good materials but, in our case, it has certainly not been trouble free. In fact, we have a cosmetic fiberglass issue right now. Maybe we got a bit of a COVID camper, maybe just bad luck, but I want to be honest about that. Thank goodness the Oliver service team is generally exceptional and none of the issues seriously interfered with our plans. We still like our Oliver and find it very comfortable and easy to find sites for.