TTs and fifth wheels rock a lot more.
Not sure how stiff your spring are but I had a 35ft Jayco front living room that had no stabilizer jacks in the rear..The most stable RV I have ever had, especially in the wind,setup..Can't imagine a TC 13-14 ft high being more stable and I have a DRW with a baby TC on it..
We all want to say our currant RV/TC is the best and there is not any way to compare unless you own or have owned all that you are comparing..Watching the neighbor setup, not knowing his level of experience isn't a comparison.
The op asked about small Fifth wheels/Travel Trailers versus a Truck camper...
"Is a small 5th wheel or TT much more difficult to back into a site and level? Have any of you owed both a short 5th wheel and a TC that can comment on any advantages or disadvantages of each setup? I dry camp 95% of the time so water capacity is important I have 60 gals now which last me 7 days.'1-It depends on the site but on average not im my opinion.
2-It depends on short..My FW measured 35 ft stem to sturn,some label that length as a 30ft or smaller..I had a 26ft labeled TT that measured 30 ft front to rear and a pickup can measure 22-23 feet bumper to bumper..Like a 26.5' Jayco RLDS is going to measure 26.5 bumper to tongue..Not likely.
3-I also dry camp 99.5% of the time and in my opinion the Outdoors RV "Mountain Series" is the best boondocker made..Very large water tanks/Built in gen set/ready for 4-6-volt batteries/solar and a suspension made for off road....They have my attention for the next RV..
Don't get me wrong..I love my TC but it has it's faults as every RV has..Water capacity is one as well as room..If it wasn't for traveling the backcountry of Idaho needing the ability to turn around anywhere,I would have a small TT or FW..
Seems I am always going down a dead end road.(laffin).