We are going on vacation and plan on going to a couple of amusement parks. We're wondering based on the price how many hours we should leave our dogs with the sitter? We are fine leaving the parks and picking our dogs up spending some time with them then leaving them in in the evening for a few hours to go back to the parks. This will be our first time and we don't want to leave them too long so that the sitter feels they are underpaid. TIA