Sorry the OP hasn't returned to see if any of this talk helped.
Now is definitely a seller's market but having to buy another house in a couple months he'll be paying a premium also.
If it were me I'd sell and plan on full-time RVing for a while; not a couple months like he plans. I wouldn't buy another house at today's prices. It's absurd what homes are selling for. If settling down, I'd buy in a very nice mobile home park - some are awesome; or keep the RV for traveling and buy a RV lot in a warm area for winter living.