For the cost of a 5th wheel receiver and a truck with the capability to do it, just pay for that service if it truly is that infrequent. I've never seen a truck with 55' ed that has 2500+ pounds of payload to handle that. That's into 3/4 ton truck territory and it does not sound like you need that capability for other reasons.
A & A parents of DD 2005, DS1 2007, DS2 2009
2011 Suburban 2500 6.0L 3.73 pulling 2011 Heartland North Trail 28BRS
2017 Subaru Outback 3.6R
2x 2023 Chevrolet Bolt EUV (Gray and Black Twins)