Generator in Class C Rental

Thx all for the replies...very helpful....I will go into further details..I am a Canadian, renting a 24 to 28 ft Class C and will be leaving from Whitehorse, Yukon to Dawson City, Yukon and will have the rental for 11 days, all but the last day will be dry camping, with no hookups and the campgrounds I will be staying in will be within 20 kms (12 miles ) between each other, and the rental will be from June 2 to June 13. The rental company tells me it is a 4000 W Cummins Onan, which is a very large unit, and burns 4 litres (aprox 1 gal. per hour) In Canada fuel is priced at $1.75 a litre Canadian, which converts to something like $7 Canadian per gallon, so one can see that it is very expensive to run..a rental Honda 2000 watt will cost me $300 Canadian for 2 weeks. The RV rental company recommends running the gen for 2 hours in am and 2 hours in pm..If u crunch the numbers, one can see that it will be very expensive to run the onboard gen..I am sure I will have comments on this info I have submitted...Thx, Jim