Advice on Limited Slip Differential

We are first time buyers of a truck and trailer. We're looking at a Jayco mid-sized model - 7500 lbs.- and will be vacation and long weekend users. We do want to go to the mountains at some point so we're trying to plan ahead.

I'm getting advice from all over the place and need help deciding on the right truck to pull this. Dealers are telling me that a 1/2 ton will be fine. My experienced brother in law is telling me that I need a limited slip differential, which is only available on a 3/4 ton truck.

We've driven both and the 3/4 ton just seems like too much truck for our needs.

I need some advice from experienced RVers please.

Thank you for the help.

I definately would get the limited slip and would go with a 250/2500 for that trailer. It is not just the trailer and it's tongue weight but also all the stuff and people you carry in the truck. It will be an expensive lesson to get too little truck and have to suffer depreciation and purchase more truck after a few trips.